answer: Luo Gang calls the operator to speak to Mr. Zhang. Luo gives a number but corrects it after the operator tells him to check again.
documents: #Person1#: Operator. Can I help you?
  #Person2#: I'd like to make a person-to-person call to Beijing, China. The number is 2135367 8, and I want to speak to Mr. Zhang.
  #Person1#: To Mr. Zhang in at 2135-3678?
  #Person2#: Yes, that's right.
  #Person1#: May I have your name and telephone number?
  #Person2#: My name is Luo Gang, and the phone number is 513-3284.
  #Person1#: Mr. Luo, will you hold the line, please - - - Mr. Luo, there is no Zhang at that number. Will you check the number again, please?
  #Person2#: What the number I gave you, operator?
  #Person1#: It's 2135-3678.
  #Person2#: Oh, I'm sorry. should have been 2135-3668, not 3678. I've given you a wrong number.
  #Person1#: Are you sure this time?
  #Person2#: Yes.
  #Person1#: OK. Let me try again.
  #Person2#: Thank you.