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:     May I help you ?  
 Person2:  No , thank you . I'm just looking . Maybe later I might need your help .  
 Person1:      I hope you will ! Take your time . We have a lot more upstairs .  
 Person2:  Oh , you do ? You certainly have a large selection . 

1