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:     What do you think ?  
 Person2:  It looks great .  
 Person1:      I would like to purchase it .  
 Person2:  Will this be cash or charge ?  
 Person1:      Here , take my credit card .  
 Person2:  Just sign here , please .  
 Person1:      Sure . Here you go .  
 Person2:  Here's your receipt . Have a nice day . 

1