What makes effective health communication?

I love my dad to pieces, but he cannot quit smoking for anything. He has been smoking since he was in his early teens and he is 62 now. That is a long habit to quit. He has tried to quit countless times and has been successful countless times until something puts him back onto them.He has tried pretty much all the methods and even though his family begs him to, it can't be done permanently.

What makes matters worse though is the way his doctor communicates with him about this. My dad is from a small town and the hospital there isn't too large. He has been seeing the same doctor for years and years. His doctor communicates in a doctor-centered style rather than patient centered. You have to know. My dad is a stubborn man. He does not enjoy being told what to do by anyone, even it is in his best interest. When his doctor tells him that he HAS to quit cigarettes every time he goes in and continues to lecture on about the risks of cigarettes to him, my dad won't listen. It is so bad that my dad will even avoid the doctor because he knows that he will just get a lecture about quitting. Of course the doctor just has the best interest of my dad in mind here, but since my dad has been smoking for over 40 years, he has probably heard it all multiple times. It's not like he doesn't know that it will kill him. 

What my dad needs is someone who is more patient-centered in their style of heath communication. He needs someone who will ask him open ended questions and that will let him take the reigns of the conversation. My dad has to decide on his own that he wishes to quit smoking in order for it to actually happen. Hopefully, he will find this one day or his doctor will learn to change his style, because all he is doing right now is scaring a man off from seeing a doctor even if he's in need.