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:     Do I have to write the invitation cards ?  
 Person2:  No , you don ’ t have to . But I think you ought to .  
 Person1:      Oh , well . If I must , I must . 

1