A nice perk

I am flying on United to Boston today -- with a stop in Denver.  Due to fog in Seattle and some screw-ups with the gate in Denver, I was literally getting to my connecting flight just as they shut the door.  No big deal; I was moved to the next flight (a 3-hour wait) and therefore have time to get some lunch and work on my email, but I didn't get a very good seat on the new flight.  I just went up to the service desk to inquire about my bags, which they think will be on the new flight, but they aren't 100% sure ... while I was standing there, the desk agent just ripped up my boarding pass and handed me a new one, with a window seat on the exit row.  It's not quite a first-class upgrade, but I definitely appreciate his initiative!