Originally Posted by
jjwjjw
but at least one of them mentioned something about not seeing availability on either of the flights.
That statement would have made me suspicious that the telephone agent was querying incorrectly, as the HKG - DPS flight almost always has availability in J (sometimes with 6 or more seats). I suspect that the agent is querying to find Z seats from SFO - DPS, and the output of the query is indicating that no Z seats can be found for the entire itinerary. I've had this outcome numerous times, and calling back and requesting each segment separately has usually succeeded for us. It's painful, but usually worth the effort.