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:     So did you get in touch with your brother ?  
 Person2:  No , not yet . I'm really worried .  
 Person1:      Well , it'd be foolish to call the police . He probably just went away overnight .  
 Person2:  Maybe you're right . But I'm still worried . 

1