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 ?  
 Person2:  Yes , I'd like to have a look at the 2 - piece suit .  
 Person1:      What size do you wear ?  
 Person2:  Middle size  
 Person1:      Then please look at this suit .  
 Person2:  Does this suit come in other color ?  
 Person1:      Yes , we have some in blue , green , black and brown .  
 Person2:  How much is the brown one ?  
 Person1:      US $ 138 .  
 Person2:  Then I'll take it . 

1