Conversation 2
Questions 8 to 10 are based on the following conversation.
[听力原文]8-10
M: Hello, Mary. It’s John. I’ve got something to tell you about the delivery of computers.
W: Oh, yes. How is it coming along
M: Well, we have problems with the ABC computer company.
W: Really What kind of problem
M: They haven’t delivered the order on time.
W: Oh, no. Why not
M: I don’t know. Could you call them
W: Yes, of course. What’s the order number
M: It’s CPU3861. Mr. Peterson is the contact man.
W: All right. I will call you back later in the afternoon.

Why did John make the call（）