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:     Excuse me . Is anyone sitting here ?  
 Person2:  No , nobody .  
 Person1:      You don ’ t mind if I smoke , do you ?  
 Person2:  Well , to be frank , yes , I do .  
 Person1:      Oh , I ’ m sorry . But this isn ’ t a no-smoker , isn ’ t it ? I mean would you mind if I smoke here ?  
 Person2:  Actually it is . Perhaps you haven ’ t noticed the sign .  
 Person1:      Sign ? What ’ s sign ?  
 Person2:  There , on the window .  
 Person1:      Oh , sorry . I didn ’ t notice it . Sorry .  
 Person2:  That ’ s all right . 

1