UA ticket, have OZ PNR, UA codeshare Asiana flights but seem unable to make economy (extra leg space) seat selection -- seems to be saying you can only do that if booked on the Asiana site. Can put up the flight on the Asiana site but "You may make changes for your own booking only. Please log-in with your ID "
International flight not domestic.
I was able to select regular economy seats on the UA site. Not none the extra leg room or front seat. Understand they cost extra.
How do I link my UA booking to my Asiana account?