I am trying to book 3 coach tickets back from SIN to JFk via FRA. The flights are there on SQ 26 but only has a separate flight combined with LH or UA. First agent said they are not available and SQ is blocking them. I was able to book a flight with SQ/LH but wondering if I can swap out the second leg to SQ. Is this one of those times that I should call back multiple times to get someone to book it for me? Completely unrelated but thought i would share, UA gave me a 2 day (49 hours) layover in HKG on a OW award ticket. The agent said the computer did that. Didn't seem like a big deal to him.