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:     Is there any ticket left for tonight's concert ?  
 Person2:  I am sorry , sir.All the tickets have been sold out .  
 Person1:      What a shame . Will there be the same performance tomorrow evening ?  
 Person2:  Sorry , sir . The only tickets of the same performance available are on 21st .  
 Person1:      That's fine . I want 2 tickets . 

1