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:     I think I need some iced water , too . Is there an extra charge for that ?  
 Person2:  Yes . We charge 50 cents for iced water .  
 Person1:      That's fine . Could you give me some more napkins , too ?  
 Person2:  Sure . Do you need anything else ?  
 Person1:      Yes . I would also like some sweet-and-sour sauce and pepper .  
 Person2:  I'll put all that into the bag for you .  
 Person1:      Do I owe you for the sauce , pepper and napkins ?  
 Person2:  No , there's no charge for those . 

1