I just booked a flight from LAX to HKG to BKK and back in December, and the HKG <--> BKK segments are on Hong Kong Airlines. Does anyone have any experience with how to select seats on those flights? I tried putting my 016 ticket number in the manage booking page on the HK Airlines website, but that doesn't work either. Also, the only confirmation number besides the UA one is a CA confirmation code.

Thanks in advance.