Hello,
I had trouble booking seat reservations via the Interrail reservations page for Brussels-Paris Thalys operated train so I called the customer service and bought the reservation there. I have a global 2nd class interrail pass and I was told that they are out of 2nd class seats but can sell me the comfort seat. I said I’ll take that since I thought that maybe then I’ll just be charged with a higher fee (the reservation was 25 €). When I got the reservation via email, it said pass comfort and 1st class. Now I’m worried that can I actually use this reservation with my 2nd class pass.