Originally Posted by AerOklahoma

So I couldn't get their website to work worth a damn and sitting on hold with them was ridiculous. I downloaded their app and was able to easily assign seats for both my girlfriend and myself. We're traveling on a United award ticket in UA F but OZ J in March (F not available between Korea and Japan). We're on different PNRs so I had to assign them separately but it was no sweat.

Hope this helps everyone!