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:     How much will it be all together ?  
 Person2:  $ 200 , please .  
 Person1:      Can I pay by check ?  
 Person2:  I'm afraid you can't , ma'am . We accept only traveler's checks and credit cards .  
 Person1:      OK . How about this card then ?  
 Person2:  We can take it . Just a moment ... Please sign here . 

1