I have a Youth Gobal pass, and am looking to book a reservation for either a double or triple room for the night train from Nice to Rome (369). I am going during the high season (July), thus all the 2nd class tickets are sold out. However, there are first class tickets available on raileurope.com ($106 for a double). The prices reflect that I have a pass, but can I purchase a first class ticket with a Youth Gobal Rail pass? Or, can I only purchase 2nd class seats for the price discounts. I am confused on this, as you may be able to tell. Thank you!