So second time in FL (usually fly BA to LHR directly and then transit Europe but this time flying AA FB and last time was pre-pandemic at LAX and they "up graded us" since it was not being used at the time we were at the airport), so DFW will be my only stop with a FL (thanks alot PHL and Covid), do we just show our boarding pass? Will they expect us? Want to keep life simple as we go to Spain. Any advise. Thanks