answer: Mr. Bell finds a problem in the L/C documents. #Person1# suggests he reject them.
documents: #Person1#: Good morning, Mr. Bell. How are you today? Are you here to sort out your L / C documents?
  #Person2#: Yes. I've been through them and there's a problem, a rather major discrepancy actually. You see? It should be KN509.
  #Person1#: I see, here it says KM509.
  #Person2#: Exactly, if we accept these it could cause a lot of problems in our record and our accounts system because the numbers don't match.
  #Person1#: Yes, I see what you mean. You need to reject these documents.