I currently have an in-progress AONE4 issued by BA in CAI. Just noticed on Amadeus that a BOS-(STL)-MSY journey is in the process of being changed to BOS-(DFW)-MSY due to cancellation of the original flights. (NB Only in transit at STL, now DFW) Does anyone think this will require ticket re-issue (or just a sticky label job) and/or will there be problems with the lack of a detailed tax calc?

Furthermore, the original sectors were booked in coach, due to lack of A class availability. However, it looks as though there is plenty of A availability through DFW. (Wish I had picked up on this originally, but never mind!) But Amadeus indicates that the revised bookings via DFW are also in coach. Is it better to approach AA or BA to get this sorted, or doesn't it matter? (Currently "on stopover" ( ) in the UK, having only completed the initial CAI-LHR sector)

Any assistance much appreciated, as always