Please answer the following question: Read the below conversation.  W: Operator, can I help you?  M: Yes. I'd like to make a collect call. My number is 7683384.  W: And the number you're dialing?  M: That's 7638558. Oh, no, I'm sorry, I forgot it's just changed. It's now 7643388.  What would the listener say?
A:
W: Please hold the line, caller.