Why can’ t they meet on Thursday?

M: I’d like to talk to you about our next building project. Can you fix a meeting for this week? What about Thursday?
W: Well, I’ m sorry. I’ ve been extremely busy this -week. I’ll be at a meeting all day on Thursday. And I’ m going out of town on Friday. Is Wednesday all right?

W: Jack must have been joking when he said that he was going to quit his job.
M: Don’ t be too sure. He told me that he was trying to sell his house.