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 do you charge for the sports shoes ?  
 Person2:  $ 60 .  
 Person1:      Well , that's a bit stiff . Do you have some cheaper ones ?  
 Person2:  Yes , the shoes on that shelf are on sale now . They are much cheaper . 

1