answer: Jenny and Mike are waiting for Jenny's sister Helena at the airport but she doesn't show up. They read her telegram again and decide to think about solutions.
documents: #Person1#: Look, Jenny. I don't understand what's going on. You said your sister was arriving at 7:30. It's 8:30 now.
  #Person2#: I'm sorry, Mike. I don't understand either. Here's Helena's telegram. Have a look at it.
  #Person1#: Arriving Heathrow Tuesday 19:30. Can't wait to see you. Can't wait to see you. Hmmm. I can't wait to see her. Jenny, where's she coming from? What airline is she traveling on? What's the flight number?
  #Person2#: I don't know, do I? This telegram is the only information I have.
  #Person1#: Never mind, Jenny. Let's have a coffee. We can sit down and think about the best thing to do.