Hi, I’m trying to book a reservation for me and my friend travelling from Paris Nord to Brussels Ziud. I have the two of our passes on my account so we can book reservations to be seated beside one another but it won’t give me an option to select both for this trip. I’ve tried to click both but it’s only allowing “1 traveller”. Is there a way to pay for the 2 seat reservations at once?
 

any help greatly appreciated!