Originally Posted by
Stiff
Determine your UA bookng reference, then call UA to ask them to confirm seats for you. In this case, AC can do nothing for you as it's UA's metal. They should be able to assign seats. Don't rely on AC as what shows in their system for seats may/may not match what UA has. Hope this helps.
Code share by UA *operated by AC.* So I think AC should allocate seats.