I have bought a Saver Day Pass to be used on June 4, 2022 and intend to travel within the day on a direct EC train from Zurich to Milan. I also like to make a reserved seat booking for the whole journey. Can this booking be done? I understand that the Saver Day Pass covers my journey from Zurich to Tirano but not beyond Tirano to Milan. How do I get the ticket to cover the second travel leg from Tirano to Milan without changing my booked seat?