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 ?  
 Person2:  I wish to buy a diamond ring .  
 Person1:      How many carats diamond do you want ?  
 Person2:  Two carats .  
 Person1:      Is this one suit for you ?  
 Person2:  No , it seems too old-fashioned .  
 Person1:      What about this ?  
 Person2:  Let me try it on , it's too small for me , haven't you got any larger ones ?  
 Person1:      Yes , try this one please .  
 Person2:  This fits me well , how much is it ?  
 Person1:      3,500 yuan .  
 Person2:  It's reasonable . Here you are . 

1