Booked a RT on AA from EWR-OGG through DFW, but don't want to fly back to EWR, want to fly to MIA. Booked separate AAdvantage tix from DFW-MIA for that day. Is this a problem with AA? Haven't done HC ticketing before. Will not have checked bags. Don't want AA to cancel everything when I don't board the DFW-EWR flight. TIA.