Hello Ckoiphouxuqu53
Welcome to the SBB Community.
We are a customer support forum run by volunteers.
We cannot answer this question as we do not have your ticket information present.
Please reach out to the SBB Contact Center team if you purchased the ticket from SBB: +41 51 225 78 56 (24/7, waiting times may be possible).
For data protection reasons, refrain from posting your ticket details here.
As a general advice, only full flex tickets can be used on all services.
The seat reservation cannot be used on another service else than indicated in the reservation confirmation.
Kind regards,
Roland