First time traveller in Europe. I have a Eurail pass. I am going from Interlaken to Venice. I have seats booked on all trains except for one. Lugano to Milano Centrale on July 2nd. 15:02-16:17. I have followed directions to try and only purchase seat reservations, but my only option to choose is to buy a single ticket. Am I simply overlooking something? Thank you for any insight!