answer: Li Hong phones to discuss the details of a lecture with Dr. Perkins. #Person1# says Perkins isn't available and will let him call Li back.
documents: #Person1#: Good afternoon! Dr. Perkins' office.
  #Person2#: Good afternoon. I'd like to speak to the doctor. Is he in?
  #Person1#: Who is that calling, please?
  #Person2#: My name is Li Hong. I'm from China.
  #Person1#: I'm sorry. Dr. Perkins is now at an important meeting and can't answer your call.
  #Person2#: I'm an exchange scholar. Dr. Perkins asked me to give a lecture. There are some details I want to discuss with him.
  #Person1#: I see, but you must speak to himself about that. Oh, well, if you leave your number, I'll tell him to ring you as soon as he is available.
  #Person2#: Thanks. My number is 7838298.