Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. If the conversation begins with a question, label it '1' otherwise '0'.
Input:  Person1:     Are you a smoker ?  
 Person2:  Yes , I'm afraid I am . My husband is a smoker too .  
 Person1:      Would you describe yourself as being a heavy smoker ?  
 Person2:  No , but my husband smokes twenty or more a day .  
 Person1:      When did you begin to smoke ?  
 Person2:  I had my first cigarette when I was seventeen .  
 Person1:      Might I ask if you have tried to give up smoking ?  
 Person2:  Yes , twice . 

1