When did the dialog take place?

W: Do you know where Tom is?
M: Sorry, I don’t know.
W: Oh, my God!
M: What’s the matter?
W: He is supposed to be at the meeting a quarter later. But I can’t find him anywhere.
M: Oh, I remember something. John told me that Tom went out for lunch at ... er ... about a quarter to two and would not be back unitl 3:30.
W: Then he will be late for the meeting.
M: What’s the time now?
W: 3:00.