I wanted to buy tickets at ticket machines around the station, but after failing twice, I found it and often didn't accept cards, and might receive cash. I walked into the manual service center, because there was a long queue, I went to the first class route (only a few people), bought tickets to the airport, only expensive about 3-4 euros, but can buy tickets faster, it is worth it, and there is no frustration, no need to queue.