What does the man mean?

W: I don’t think the job has to be done perfectly.
M: Maybe, but it’s important to do your best.
W: Yes, maybe you are right.
M: Just do your best.

M: Good morning, I’d like to speak to Mr. Jones, please. This is Tim Kunts at the Oak Street Computer Center.
W: Mr. Kunts, my husband isn’t at home. I can give you his business phone if you’d like to call him at work, though.
M: Yes, please.
W: It’s 8760-8342.