I accidentally booked seat reservation for 27th instead of 28th December trains Paris-Bruxelles with Thalys trains. The train number is the same, departure time is same. My Ticket requires a seat reservation, but it’s not available to reserve anymore for any trains for tomorrow the 28th. Can I still travel ? What will happen, can i prove i bought it, but made a mistake? I know there are still places left since on Thalys it still possible to book, but it cost 150euros for a ride of 1h45.