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 can I do for you , madam ?  
 Person2:  I'd like to buy a toy car for my son .  
 Person1:      How about this one ?  
 Person2:  It looks nice.How much is it ?  
 Person1:      They're three hundred dollars .  
 Person2:  Oh , I'm afraid it's too expensive.Can you show me something cheaper ?  
 Person1:      OK , This one is one hundred and twenty.It ' s the cheapest here .  
 Person2:  OK , I'll take it.Here ' s the money .  
 Person1:      Thank you very much . 

1