“the steward refused saying cannot change seats after plane is in the air!”
He/she/it is lying. They do it all the time.
I figured that, but was in no mood to start a fight with the crew. It was red eye flight and I did not wish to be dumped off at some airport. I needed to get to Seattle to visit my first grandchild. I guess I should have just moved quietly to one of the empty seats instead of asking the crew, who likes to exercise authority. Planes are flying full, airline staff does not have to be courteous and accommodate passengers.
On the return flight to Charlotte, I upgraded to first class, and it was at least roomier and quiet.