Who is the visitor?

W: Can I see Mr. Johnson, please? I’ve an appointment at 10:30.
M: What’s your name, please?
W: McDonald, Jane McDonald.
M: Ah, yes. Mr. Johnson’s expecting you.

M: Do you like your salad?
W: Yes. It’s nice and fresh. And I’m thinking of some ice cream after it. Is yours good, too?
M: No. Mine is rather tasteless.
W: Maybe you need some salt and some olive oil.