Good morning, we have a question about seat reservation.
Me and my friends booked some travel days in Portugal and in some options it says that seat reservation is required.
Now, when we try to book them it says that we need to do it at a ticket office or self-service machine so we supposed we have to ignore the warning and book them when we're there.
The problem is that we keep getting emails to not forget to book the seats, so we are not sure on what to do.
Thank you very much.