answer: #Person2# tells #Person1# that incorrect bills have been sent to her for several times. #Person1# apologizes and promises it won't happen again.
documents: #Person1#: Oh, madam, what can I do for you?
  #Person2#: I'm sorry to say the bill you sent me was incorrect.
  #Person1#: Incorrect, madam? That's very strange.
  #Person2#: Yes, I know. And what's more, this isn't the first time.
  #Person1#: Really, madam? I find it very hard to believe.
  #Person2#: Look. It's happened 5 or 6 times in the past 3 months.
  #Person1#: Ah, well, I must apologize, madam. It's the new computer.
  #Person2#: Well, don't you think it's about time you got it working properly? It's most inconvenient.
  #Person1#: I agree entirely. I'm very sorry about it. I promise it won't happen again.