Originally Posted by
djibouti
Trying to do this now to move the first segment of a SIN-NRT-LAX award up a few days. I had to waitlist the entire change because the NRT-LAX segment (which we actually have confirmed seats on already) doesn't have availability. So you can't book what you want for one segment then call to change another... a bit annoying.
This is the weakness of their computer system.
When you make change to any booking, they sort of try to make a fresh booking. So if you are making a change to one segment but not the other, naturally it is not available because you have already taken the few award seats even if the new segment is actually available if booked on its own.
So Waitlist is inevitable, but after multiple calls and many many notes, it usually clears. Need a human intervention at the back end to review your case and clear it.