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:     You saved my life yesterday , Rachel . I can't believe I forgot to bring my wallet when we went to lunch with those clients .  
 Person2:  It was a good thing I had enough on me .  
 Person1:      Let me buy you lunch today to pay you back . 

0