What's wrong with you?
Nothing serious.
Maybe you'd better have a medical examination.
I think there is no need. I'm just having a cough and feel tired.
You need to take an X-ray photo of your lungs. I advise you to do as I told you. After all, whatever work you want to do, you must have good health. Don't you think so?
Thank you. But shall I make some calls to arrange some important business affairs first?