What’ s the relationship between the two speakers?

M: Good morning, Mrs. Brown. How are you today?
W: Oh, not very well. I’ ve caught a bad cold.
M: Have you got a temperature?
W: Yes, I’ ve got a fever.
M: Are you coughing?
W: Yes, especially at night. It’ s quite bad then. And I can’t go to sleep.
M: Oh, I see. I can understand that. Urn, I think you’ ve got the flu. I suggest you should not go to work, and take this medicine once every four hours.
M: What else should I do?
M: Drink more water and have a good rest.
M: OK. Thank you. Good bye!
M: Good bye!