Hi guys. I live in the Netherlands and plan to travel to Swiss in December. I bought a 2nd-class swiss travel pass (4 days, consecutive) and used it to reserve a 1st-class classic glacier express seat, from Zermatt to St. Moritz. (only paid seat fees CHF 39). I try to pay the upgrade fees on sbb.ch, and see the point-to-point class upgrade, but I didn’t find the swiss travel pass option among discounted cards. Could I choose the half-fare travelcard?