Who is the man speaking to?

W: Good afternoon, Dr. Anderson’s office.
M: Hello, my name is John Gremer, and I was hoping I could come in today to see the doctor.
W: Are you a patient of Doctor Anderson?
M: Well, no. I’m in town at a convention and the manager of the hotel where I’m staying suggested that I call you.
W: What seems to be the problem?
M: Well, I got this ringing in my ears.
W: Are you in any pain or is there any discharge?
M: No discharge, just a slight earache.
W: The doctor will be busy at the hospital until this evening. The earliest you could see him would be tomorrow morning at ten.
M: I’ll come in then if that’s okay.
W: That will be fine. In the meantime, you Should try to take it easy.