answer: #Person1# wants to go to New Zealand around Christmas. #Person2# suggests #Person1# book the flight right now for a lower price.
documents: #Person1#: Let's go and have lunch together.
  #Person2#: OK!
  #Person1#: By the way, I'm thinking of going to New Zealand around Christmas for three weeks. It's such a beautiful country. I've never been there before.
  #Person2#: Have you booked the flight?
  #Person1#: Not yet. I'm planning to book my flight in two weeks' time
  #Person2#: Book your flight right now.
  #Person1#: Why?
  #Person2#: Because the longer you leave it, the more expensive it will be. As a matter of fact, the prices may double at Christmas time. New Zealanders usually go home for Christmas.
  #Person1#: Then I'm going to book my flight tomorrow morning.