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:     Can I help you , sir ?  
 Person2:  I'd like a table for two , please .  
 Person1:      Do you have a reservation , sir ?  
 Person2:  No , I'm afraid not . Can I sit over there ? There's a table free by the window .  
 Person1:      Sorry , sir . That table has been reserved . This way , please . How about this one , sir ?  
 Person2:  Fine . I'll sit here .  
 Person1:      Would you like some drinks ?  
 Person2:  I'll have a double whiskey on the rocks . 

1