What does Mr. Smith tell his secretary?

W: You have a telephone call, Mr. Smith?
M: Who is it?
W: He didn’t say.
M: Tell him I am not in the office. Say I’ll be back by 4 o’ clock.
W: All right. Hello, sir?
M: Yes?
W: I am afraid he’s just stepped out of the office. May I ask who’s calling?
M: Yes, this is Edgar Davis from Boston.
W: Oh, yes, Mr. Davis. I am sure he won’ t be back until 4 o’ clock. Could you give me your number, please?
M: Yes.