What time does your train leave?
Girl 1.  Hey, Marie, can you drive me to the train station?
Girl 2.  Sure!  What time does your train leave?
Girl 1.  I'm not sure.  Let me check my ticket.
Girl 2.  So what time does your train leave?
Girl 1.  It leaves at 2:00.
Girl 2.  Are you sure?  Check again.
What time does your train leave?
Girl 1.  My train leaves at 2:00.  Is there a problem?
Girl 2.  Yes! It's already 2:30!  You missed your train!