Scenario: I have a DH about mid month so Corp Travel won't get around to dealing with it for a while (working on more current reservations first). My long haul DH dictates FC but it isn't available on the flight the pairing is based on. So eventually I'm booked in coach and wait-listed for First - but that won't happen - it's booked full and will stay that way. FDX could book a flight leaving about 2 hours later that has FC available but it would cost a little more. At what point is Scheds obligated to revise the pairing and book a different flight that has FC? If the answer is, "They never will" then what have you folks done to encourage them to revise?