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:  Do you have any blue shirts ?  
 Person1:      Yes . What's your size ?  
 Person2:  I'm not familiar with American size .  
 Person1:      All right . Let me see . I think you'd wear a size 8 . This shirt is size 8 .  
 Person2:  It's pretty . May I try it on ?  
 Person1:      Sure . The fitting room is over there .  
 Person2:  Thank you . 

1