Don't Talk To Strangers

A smoker was smoking at the airport. A man came and asked him.

man : How much do you smoke a day? 
smoker : Why? 
man : If you had collected the money instead of smoking, the plane which is in front of you would have been yours. 
smoker : Do you smoke? 
man : No! 
smoker : Is that plane yours? 
man : No. 
smoker : Thanks for your advise. but that plane is mine. 
LESSON? 
-Don't talk to strangers! : ))