What does Harris probably want to do with Olivia?

M: Hi. Is Olivia there, please?
W: I’ m sorry. She’ s out for lunch. Do you want to leave a message?
M: Yes, this is Harris. Could you tell Olivia that I’ll wait for her at the box office of the cinema at 7:10?
W: Sure, Harris. You’ll wait for her at the box office at 10:00.
M: No, at 7:10.
W: Oh, sorry. At 7:10. I’ll tell Olivia.
M: Thank you!