Originally Posted by
JCflyer
do you know where this availability show during the process? is it before or after purchase? I mean before or after you click the purchase button?
It's best to handle this through AC reservation. There is no service charge if you are buying a Y/M/U fare.
Ask if there is any upgrade seat available on the flight and date that you want to travel. If there is, ask the agent to book the flight in Y or M and do the upgrade at the same time. You need to issue the ticket right away though. You are not allowed to "hold" the reservation without issuing the ticket.