I have to go to DEN tomorrow. Sadly I am forced to fly UA (where's the puking smiley?). What are the chances (I know the answer to this) that AS would take pity on my impending discomfort, honor my ticket and put me in a middle seat on one of their flights? It would be lots better than a window seat in economy squished.

...yes forced...gov't contract between SEA is Untied.