answer: #Person1# teaches #Person2# to serve himself in a cafeteria. Then #Person2# needs to tell the man behind the counter what #Person2# wants.
documents: #Person1#: Food is less expensive in a cafeteria, because you serve yourself.
  #Person2#: How to do it?
  #Person1#: Just pick up a tray, then put a knife, a fork, a spoon and a paper napkin on it and stand in the line.
  #Person2#: How long will it take to reach the buffet?
  #Person1#: Not long, because people rush for lunch.
  #Person2#: The line sure does move fast.
  #Person1#: Tell the man behind the counter what you want.
  #Person2#: OK. I like that green vegetable but I don't know how to call it.
  #Person1#: Just point to it if you don't know the name.
  #Person2#: All right.