answer: #Person1# asks Lucy to send two letters to Mr. Charles' office.
documents: #Person1#: Would you please mail these letters, Lucy?
  #Person2#: Yes, Sir.
  #Person1#: These two are urgent letters and should be sent by registered express airmail. Others are ordinary letters.
  #Person2#: All right, who should I send them to?
  #Person1#: It ' s sent to Mr. Charles. I believe he is in London.
  #Person2#: Ok, home or office address?
  #Person1#: Office address, please. He might be at work when they arrive.
  #Person2#: Should I enclose this commercial paper with these two letters?
  #Person1#: Yes, it ' s right.