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, City Taxi.
W: Good morning. I’d like to book a taxi to the airport for Saturday morning, please.
M: What is the exact time?
W: 8:30.