answer: #Person1#, a back-packer from America, knocks upon #Person2#'s door for some water. #Person2# thinks #Person1#'s cool and wants to be a back-packer in the future.
documents: #Person1#: Excuse me. Is there any body here?
  #Person2#: Yes.
  #Person1#: I've finished up all my water. I would kill for a sip of water.
  #Person2#: Sure, come on in.
  #Person1#: Thank you very much. Are you here alone?
  #Person2#: My father and sister are out to photographing. What about you?
  #Person1#: I'm a back-packer from America.
  #Person2#: What is a back-packer?
  #Person1#: It means a hiker who loves traveling around the world.
  #Person2#: Cool. You must have been to a lot of places.
  #Person1#: Yes, actually almost half of all the countries over the world. I love traveling places.
  #Person2#: So cool. I want to be a back-packer when I grow up.
  #Person1#: You can do it. But do work hard on your English to make it easier.
  #Person2#: I'll try my best.