Originally Posted by Jesse

You're assuming it's there because of an OE, right? Why can't the pilot just have picked it up and decided he made a mistake and doesn't want it any longer? He may have picked it up because he thought that trip looked more attractive to other guys in the category than the one he previously had on his schedule, and thus someone might pick it up freeing his schedule of all trips during that time frame. This assumes he couldn't just drop it straight out because there wasn't enough resv coverage.