Thank you. Good afternoon, everybody. Welcome to trivago NV's financial results conference call for the first quarter ended March 31, 2019. I am pleased to be joined on the call today by Rolf Schrömgens, trivago's CEO and Managing Director; and Axel Hefer, our CFO and Managing Director. The following discussion, including responses to your questions, reflects management's views as of today, May 1, 2019, only. We do not undertake any obligation to update or revise this information. As always, some of the statements made on today's call are forward-looking, typically preceded by words such as we expect, we believe, we anticipate or similar statements. Please refer to today's press release and the company filings with the SEC for information about factors which could cause our actual results to differ materially from these forward-looking statements. You will find reconciliations of non-GAAP measures to the most comparable GAAP measures discussed today in our earnings release, which is posted on the company's IR website at ir.trivago.com. I encourage you to periodically visit our Investor Relations site for important content, including today's earnings release. Finally, unless otherwise stated, all comparisons on this call will be against our results for the comparable period of 2019 -- '18. With that, let me turn the call over to Rolf.
Rolf Schrömgens: Welcome, everybody. Many thanks for joining our first quarterly earnings call in 2019. Let me start with thanking the team for a very good quarter, not only in terms of financial results, but especially for how they showed progress on important operational topics. We are very pleased with the start into the new year. We've repeatedly said that the key improvement we want to see for the first 2 quarters is on profitability of our business, and profits turned out stronger than we expected. This will now give us more confidence and more flexibility to invest into growth opportunities in the second half of the year. Before we go into the numbers, let me point out some operational highlights that we have made -- that have made a significant step forward. On brand marketing, estimates iterating new spots concepts. These are focusing on clearly messaging our competency in aggregating prices and inventory. We are already seeing promising results in various countries. On back-end infrastructure, we have successfully rolled [Technical Difficulty] structure to 100% of our traffic, which is also now running in the cloud. That allowed us to switch off the core of the old application, which has grown over 15 years. Notably, our cloud shift was done with very little impact on our P&L. On alternative accommodations, we continued to make progress to broaden our offering and increase visibility on vacation rentals and private apartments within one single integrated search. On registrations and [Technical Difficulty] to ramp up our booking [Technical Difficulty] that will give us in the future the chance to continuously learn and improve performance of individual users. On our mobile app. We are continuing to shift branded users to our app. It is an ongoing continuous process over the last years, but we see that our latest changes positively improved performance on most metrics. On advertiser relations. We used Q1 to hold executive summits with our core advertisers here in Düsseldorf. We brought the teams together to align perspective and to drive joint projects. We are very happy with the progress and are working together to maximize user experience throughout the fund. We are very pleased with the start into the new year, which you find summarized on Slide 5. Following our optimization measures in advertising spend, in Q1, we managed to turn our business from our largest loss in trivago history to our most profitable first quarter. We reached a net income of €7.8 million [Technical Difficulty] €29.6 million from a net loss of €21.8 million in the first quarter 2018. As well, adjusted EBITDA was €20.9 million compared to an adjusted EBITDA loss of €21.9 million, so up €42.8 million year-over-year. Our adjusted EBITDA margin reached a Q1 record of 10%. We reduced our advertising spend by 36% compared to Q1 2018. And in line with our expectations, our total revenue decreased to €28.8 million or by 20%. Also, thanks to a broadly stable commercialization in Q1, our return on advertising spend, or ROAS, improved significantly to 137% compared to 108% in Q1 2018. I would like to take a bit of time to explain the story behind the development of 2 of our key metrics that we explain on Slide 6. From a marketing standpoint, the optimization of our advertising spend resulted in a reduction of qualified referrals. [Technical Difficulty] their likelihood of resulting in a booking. From the product side, we continued innovation in order to increase user engagement. Higher engagement on trivago is ultimately resulting in higher retention, higher quality of leads we send to our advertisers, but also a lower number of qualified referrals. As a result, the 2 underlying drivers of referral revenue, QR and RPQR, has been impacted by these optimizations, and as such, the development has diverged. As we left these effects in the third quarter this year, we expect to see more stability in these drivers going forward. In summary, we continue to see the positive results of the measures we have undertaken at the end of Q2 2018 resulting in improved profitability. This is highlighted clearly on Slide 7, where you see the 2 different stories pre and post Q3 2018. We believe we are now on a stable profitability base as we have optimized ad spend and continue to do so. While we showed a negative contribution development for the first 2 quarters in 2018, contribution improved very consistently for the last 3 quarters. The current quarter showed a €37 million higher contribution than the first quarter 2018. A very similar development is seen in our adjusted EBITDA margin, which we improved by 18% quarter-over-quarter. We are aiming on delivering long-term profitable growth and believe that we are on the right path to do so. Another continuing topic we have been updating you on is on -- is our ongoing effort to onboard alternative accommodation providers. We are proud to say we have now crossed 1.8 million properties, and we will continue on our path of gradually increasing our alternative accommodation inventory. We believe that alternative accommodations will improve our offering significantly by making it more comprehensive and cover long-tail destinations more effectively. Making it all available on one integrated search is a key focus for us. Given the long-tail nature of AA inventory, we believe we are already approaching relevant scale from an inventory perspective and are testing ways to leverage our inventory to better serve our users given the context of their search. As always, we want to give you an update on our advertiser segmentation. Q1 2019 is again broadly in line with the historic distribution. Our 2 largest advertisers have slightly lowered share in the order of 1% to 2% as other advertisers on our platform have picked up share compared to Q1 2018. Overall, our marketplace and option dynamics remain stable. As we said, we continue to invest into the relationship work with our advertisers and are very happy about their commitment to work together on important projects. To conclude. This quarter is a continuation of measures we have put in place last year, and we see our profit improvement as a clear positive sign that we are reaching a solid base. Our marketplace remains stable, with no significant change in our commercialization, and we improved the dialogue with our advertisers. Our next focus will be on delivering profitable growth. We consequently optimize our product towards higher engagement to improve persist value and, ultimately, retention. Let me now hand over to Axel to take a more detailed look at the numbers.