What are the speakers mainly talking about?

M: Hello. This is Blake from Dr. Gray’s office. I’m calling to remind you that you have an appointment for a medical checkup on Wednesday at 9 A. M.
W: Oh, thank you for calling. I had totally forgotten. Unfortunately, I can’t make it. I’m going on a business trip from Tuesday to Thursday. Can I reschedule it for Friday?
M: Okay. Hmm...We have openings on Friday at 10 in the morning and at 5 in the evening. Which time do you prefer?
W: Let me think. Well, I have a meeting on Friday afternoon, so please put me down for Friday at 10 A.M. I won’ t forget it this time. Thanks.