Hi, I have a DUB-LHR-ORD trip booked with plenty of time to spare, however just in case of a long delay on the first leg I'd like to know who would be responsible for rebooking us in the event of misconnecting. It's BA metal on both but booked on AA.com and on AA ticket stock.

Suspect the answer is call AA but would BA agents at T 5 be able to help at all?

Thanks