I found immediate availability for HKG-JFK on a particular date, but when I try to book SIN-HKG-JFK, it says only waitlist. I did just that. Would CX release one of the plentiful SIN-HKG sets, since HKG-JFK is immediately confirmable? Will calling AM (which I dread to do under current situation) help with the release of a SIN-HKG seat?