answer: #Person2# plans to travel to the United States. #Person1# suggests visiting Washington D. C, Las Vegas, New York, Los Angeles, Seattle, and Hawaii.
documents: #Person1#: I hear you are planning to travel abroad.
  #Person2#: Yes. I'm going to the Untied States for travel. What places do you recommend?
  #Person1#: In my opinion, there are several places you mustn't miss, like Washington D. C, Las Vegas, New York and Los Angeles.
  #Person2#: Someone suggests that I should go to Seattle and Hawaii.
  #Person1#: Yes, you may consider those two places also. Seattle, for example, is worth visiting and there's a very famous museum called Museum of Flight.
  #Person2#: And Seattle is the home of Microsoft and Boeing. That must be a great place. I can't miss it.