Originally Posted by
flyingeph12
I would call and speak to a different agent. With First Class, you need original booking class, but with Main Cabin you don't.
Alternatively, have you tried doing a same-day change online? I'm not sure it'll work since you're already upgraded, but it's probably worth checking.
I checked SDC online via my res and every flight said unavailable despite E open on all flights.
I’ll call back again and see what another agent says.
Thanks for the info. 👍