That’s easy, nothing sinister going on. He/she is flying American through DFW? No doubt she is simply stuck at a gate waiting to get booked on a connecting flight while AA has continually canceled flights or he/she has faced excessive change fees and so is waiting for the no-fee rebooking. Search the airport, look for the person softly sobbing into their drink. Of course with this being an AA hub, there will probably be hundreds of people doing that. Ok, sorry about the off topic rant but AA used to be my favorite airline, but they have sunk to the point I simply will not fly them, period. The once or twice a year business requires me to fly I will (and have) gone out of my way to avoid AA. Including taking very early or very late flights, or driving 3 hrs to another city - all to get a different airline. Hope he or she turns up ok, but this sounds like they dropped off the radar by choice.
My first assumption was this fake woman dropped off the radar by choice.