Hi there I am trying to book a train for myself and my partner from Paris to Nice on the 8th of may. Each time I select a time on the eurail site and try reserve a seat I get all the way through to the payment page and then an alert shows saying one leg is no longer available. Have changed times and dates and it happens every time. We have paid for the month travel pass and I am very reluctant to book a full price ticket but I am running out of options. We get into Paris on the train at 10:20 and ideally for straight to Nice. I understand we could book at the train station when we arrive but it is risky there aren’t my seats left. If you can help in any way that would be much appreciated. Thanks