answer: Bob invites Ellen to the rock concert on Friday night but he's broke, so Ellen offers to treat him as she's saved some money by working as a waitress.
documents: #Person1#: Hi, Ellen! How is it going?
  #Person2#: Can't be better! Bob, aren't you glad the semester is over?
  #Person1#: Yep! Are you going to the rock concert Friday night?
  #Person2#: I didn't think much of it. Are you?
  #Person1#: Sure. Would you like go with me?
  #Person2#: Sounds like fun.
  #Person1#: You'll have to buy your own ticket though.
  #Person2#: Are you broke again? Let me treat you.
  #Person1#: Wow! When did you come into so much cash?
  #Person2#: You know, I am a waitress at the student center. Anyway now those final exams are almost over. I'd love a night out.