Where did the dialogue happen?

Mr Baker is very happy to see Miss Green every morning because she is a good secretary.
   One Monday Miss Green didn’t come to work because she was ill. She had a terrible cold and a bad headache, so she phoned Mr Baker. (The telephone rings.)
W: Good morning, Mr Baker.
M: Good morning, Miss Green. What’s wrong? Where are you?
W: I am at home. I’m ill. I’m afraid I’ve got a terrible cold and a bad headache.
M: I’m very sorry to hear that. Well, you’d better stay at home.
W: Thank you, Mr Baker. See you tomorrow.
M: See you tomorrow. Goodbye.
W: Goodbye, Mr Baker.