text: Polly: Why aren't you at school yet?
  Ricky: We don't have school today.
  Ben: The class went for a trip
  Polly: Shit
  Polly: Really? 
  Polly: I must have forgotten
  Ben: Were you supposed to go?
  Ben: Me and Ricky, we didn't pay
  Polly: I don't know. I totally forgot about this trip
  Polly: I don't even remember if my mom paid
  Polly: I was sick last week 
  Ricky: The teacher was talking about the trip all week
  Polly: Well, I missed it. 
target: The class went for a school trip today. Ben and Ricky hadn't paid, so they didn't go. Polly has totally forgotten about the trip and she doesn't even know whether her mother paid for it.