Could some airline genius answer this question? Hypothetical question. I am at the airport in St. Louis with a nonrefundable ticket to Baltimore on the 6 p.m. flight which is full. It is 4 p.m. and there is a 4:30 p.m. to Baltimore that will leave with empty seats. Is it not in the best interest of the airline to get me on the 4:30 flight to open a seat on a sold out flight. Any ideas? Steve