AS needs to get an F class section on the Q-400 aircraft. Saw the red letters of death (schedule change!) when logging in to My Trips today --- didn't have easy access to what was originally purchased when I called. The agent on the phone? "Flight number change" (no mention of the change of aircraft on leg 1) and you're now in Row 20 on what had been an all-FC ticket to Hawaii. Called back when I was able to pull up email and get the original routing details. The 7 am flight out of GEG to SEA is now a Q-400, and the 737 service got moved to the 6 am flight (not a peep out of the original agent on this). Second agent was able to change us to the earlier flight (no point in flying QX when paying for F). On the return, discovered that the schedule change had an ancillary benefit after replicating the booking online --- there's a new 8 pm return to GEG from SEA that is a 737 --- and the schedule change permits a legal, but tight, connection in SEA that will get us home 3 hours earlier. Less than helpful agents --- very mechanical and not thinking of keeping a booked FC ticket in First. At least a FC section on a Q-400 would allow for the class of service bonuses to apply to purchased F.