Tech's French Club is having a big fancy dinner tonight and one of the members asked if they could borrow my cooler to hold ice for the drinks.  I said sure, and she said she'd pick it up today at 11.  She called about 11:10 to say that she couldn't get it then, could she come at 12:30?  I said sure, come at 12:30.  At 12:40, she called and said she needed to stop by Hobby Lobby first, but I told her that wouldn't work since I needed to leave here before 1:30.  It is now 12:52, and she has yet to show up.  (She was on campus when she called, which is about 7 minutes from my house with traffic.)

Why would you say you'll be somewhere at a particular time if you are apparently incapable of actually being on time?