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:     Hi , can I help you ?  
 Person2:  Yes , please . I'm looking for a sofa .  
 Person1:      What about this one ?  
 Person2:  May it be used as a sofa in the day and a bed during the night ?  
 Person1:      Oh , you want a convertible sofa . This way , please . Over there is the one you want . 

1