Frank: What's the matter? Why are you complaining?
Kate: Oh, I have a terrible headache!
Frank: Well, you should stop smoking!
Kate: It's not that.
Frank: Why don't you take an aspirin?
Kate: No, they don't have any effect.
Frank: Then, you'd better see a doctor.
Kate: Yes, maybe you're right.
Frank: If you want to see Dr Smith, you need to call him right now.
Kate: Do you think I should?