Thank you, Marty. Good morning, everyone, and thank you for joining us. I'll start on Slide 11 with some highlights from the fourth quarter. EPS was $2.08 per diluted share. This includes $1.76 gain related to tax reform. Excluding this gain, our EPS was $0.32. Our results included $23 million in expenses related to our $1,000 bonus to crew members. This bonus reduced our EPS by approximately $0.04 per share. The fourth quarter was also affected by hurricanes Irma and Maria, which reduced EPS by $0.09. Appendix A of the presentation shows the final hurricane impact for the quarter and for the full year. Pretax margin was 9.7%, down seven percentage points from the fourth quarter of last year. However, excluding the impact of hurricanes and the crew member bonus, our pretax margin was 13.2%. Finally, profit sharing accrued to the full year was $34 million. In the fourth quarter and 2017, we took actions to navigate a complex external environment all aimed at protecting and enhancing our margins. These actions included capacity adjustments and redeployments following a challenging summer and to mitigate the impact of severe hurricanes. At the same time, we are also laying the foundation of what we believe will be superior margins through revenue structures discussed by Marty and the structural cost program. Turning to tax reform. In the fourth quarter, we recorded a $570 million noncash gain related to the revaluation of our deferred tax liability. Looking to 2018, we anticipate that JetBlue's effective tax rate will be between 24% and 26%. As you know, we are adopting new accounting standards on revenue recognition as of January 1, 2018. The guidance we are providing today is under the old accounting standards. However, we do not expect the adoption of the new standard to have a significant impact on our RASM guidance. Appendix C of the earnings presentation shows the timeline of how we expect to transition to the new standards. Moving to Slide 12 and unit costs. Fourth quarter CASM Ex-Fuel increased 8.1% year-over-year, including a 2.1 point impact from the crew member bonus. This caused our CASM Ex-Fuel growth was roughly at the midpoint of our range excluding the crew member bonus and is the fourth consecutive period in which we achieved bonus for guidance. For the first quarter of 2018, we expect CASM Ex-Fuel to range between 2% and 4%, driven by sales and marketing and other expenses. Our guidance includes the cost related to the recent Winter Storm Grayson, which closed JFK for over 22 hours. For 2018, we expect CASM Ex-Fuel to range between negative 1% to plus 1%. As cost guidance includes operational investments to mitigate ATC challenges that we expect to reoccur this summer. We are proud to be addressing potential disruptions to lower aircraft utilization and longer term times of critical afternoon periods in the schedule. Currently, high oil prices are also shifting our balance towards lower aircraft utilization, which naturally adds pressure to CASM Ex-Fuel. I'll return to our 2018 CASM in a moment as we approach an important inflection point in the second half of 2018. Our 2018 guidance, of course, does not include any potential outcome from the ongoing contract negotiation of our pilots. We are including the pay increases for other crew members, including the 5% raise previously agreed for our in-flight team effective the 1st of January. Before moving to the next slide, I want to mention the change to our CASM Ex-Fuel metric. Starting with today's guidance, we will add together other non-airline expenses related to JetBlue Travel products, with the expenses related to JetBlue Tech Ventures, which were previously excluded in the CASM Ex-Fuel guidance. This change is completely immaterial to our CASM Ex-Fuel growth in 2018, but we believe it provides an improved framework as we look to invest in capital light and high margin ancillary revenue streams. We anticipate that this will be yet another long-term building block to achieve our superior margin goal. We've included additional details in Appendix B of the earnings presentation. Moving to Slide 13 and an update on our structural cost program, we're now one-year into the program and are pleased with our progress. Today, we've achieved approximately $90 million in annual 2020 run rate savings, up from the $70 million we highlighted on our last earnings call. We continue to expect cost savings between $250 million and $300 million by 2020. Starting with Tech Ops, I discussed through the past year a significant part of our progress in this pillar relates to ongoing RFPs. Our work includes the RFPs to NEO engines and maintenance that is underway, as well as the recently launched maintenance RFP for our V2500 engine fleet. We're seeing a positive response from our business partners. We have also invested in technology that allows our crew members to optimize heavy maintenance and in venture planning, making our team more efficient. Turning to the corporate and airports pillars, we've made great progress in improving our strategic sourcing process and providing customers and crew members with better tools, which allow crew members to be more productive as we grow. Most of the savings to-date in the corporate pillar are related to renegotiations with business partners. So far we have achieved approximately $20 million in savings in 2017 and we expect close to additional $20 million more in 2018. We spent nearly $800 million in business partners, excluding Tech Ops, making these sourcing efforts critical to our success. In the airports pillar, the ongoing work is related to improving productivity. We have now deployed self-tagging technology in 12 lobbies. This initiative is part of a broader effort to empower both our customers and crew members and allow crew members to focus more on what they do best, providing outstanding hospitality. We're also focusing on standardizing our business partner management practices. Our progress in this pillar will allow us to grow more efficiently, especially given the physical limits of our airport infrastructure. Lastly on distribution, we have made great progress particularly in renegotiating distribution agreements with business partners such as online travel agents. We are now focused on incorporating new functionalities in our customer service centers and self-service tools for our customers both through our website and mobile apps. This not only supports our direct distribution strategy but also lowers the cost of servicing customers after they have purchased their ticket. As we execute our direct distribution strategy, it is critical that we invest in these digital tools and look for further opportunities with our business partners. Turning to Slide 14, we are approaching the important inflection point in our CASM Ex-Fuel growth trends in 2018. Even though our trends have improved since late 2016 and early 2017, we expect a higher impact of the structural cost program starting in the second half of this year. We expect CASM Ex-Fuel in the 1.5% to 3.5% range in the first half. By the second half, we expect that cost initiatives to have a higher impact on our CASM Ex-Fuel growth, and we expect CASM Ex-Fuel to decline in the range of negative 3.5% to negative 1.5%. Part of this decline clearly relates to hurricanes and crew member bonus in 2017. However, excluding these items, we expect underlying CASM Ex-Fuel growth to slow as maintenance sourcing and airport initiatives further bend down our unit cost trends. While still too early for formal guidance, we expect that CASM Ex-Fuel trends to improve through 2018 and even further into 2019 and 2020 as the benefits of structural cost program ramp and our A320 cabin restyle program gains critical mass. Based on the progress we are seeing, we remain confident that we can achieve a flat to 1% compounded annual growth rate of CASM Ex-Fuel from 2018 to 2020. The base share is our 2017 results. But to be clear, this excludes the cost impact of the tax reform bonus of 0.5 points. Turning to fleet on Slide 15, we closed 2017 with 243 aircrafts, adding a total 16 during the year, including one 2018 delivery that we shifted a few weeks earlier into 2017. We are pleased to announce that we have kicked off our cabin restyling program on our A320s with the first prototype going through modifications at the same time of the scheduled heavy maintenance checks. During the past quarter, we made significant progress in addressing certain quality issues of our business partners. We believe this multi-year restyling program will allow us to increase capacity in a capital efficient and customer-focused way. As part of our comprehensive fleet review, we continue to explore options to our E190 fleet. Our options remain to maintain the current fleet of E190s to full replacement with an alternative aircraft type. The recent changes in the aircraft OEM landscape, which has taken place during the course of our review, have presented new opportunities and we are factoring these potential changes into our assessment. We are focused intently on getting the best outcome for our crew members, customers and owners. We continue to balance the opportunity for margin improvements with our capital commitments. We have made great progress in evaluating how the A321-LR which fit into our successful Boston and New York focused city strategies. The bulk of the review is completed, and we will update the market when we have news to share. As a reminder, our LR work does not impact our medium-term CapEx guide. The LR option allows us to convert the existing A321neo orders but the aircraft is not scheduled to be available until the end of 2019. Turning to our balance sheet on Slide 16, we are pleased that during 2017 we received two ratings upgrades, and we have one of the strongest balance sheets in the industry. This provides us with the foundation to prudently invest to grow our business while allowing us to take a balanced approach to capital allocation. Our CapEx guidance for 2018 is between $900 million and $1.1 billion composed of up to $900 million in aircraft and the remainder in non-aircraft spent. We are very comfortable with our fleet plan through 2020. We closed the year with an adjusted net debt-to-cap ratio of 28%, which reflects the progress we have achieved in deleveraging and the impact of the large benefit related to tax reform. At the end of 2017, cash and investments were approximately 10% of trailing 12-month revenue. We continue to deleverage our balance sheet while repaying $194 million of debt during 2017. Late last year, our board approved a new two-year $750 million share repurchase authorization. We intend to continue to repurchase shares opportunistically. As a reminder over the last year, we have returned 6% of our average mark-to-market capitalization to shareholders. We also expect to continue to balance our capital allocation for the benefit of customers, crew members and owners. I do want to thank crew members for all their hard work as we navigate to some exceptional events in 2017. This past year, we demonstrated our ability to sustain solid margins and make progress in our commitments to all our stakeholders. While addressing our unit cost growth and making investments in our brand, operational network, we continue to lay the foundation that will, we believe, achieve superior margins. Looking into 2018, we are excited to advance our work to create long-term shareholder value. We will now take your questions.