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:     Well , what about it ? As it happens I've got two tickets for next thursday evening . I thought perhaps .  
 Person2:  Well , thanks all the same , Denise . But no I don't think.Sorry , I'm sure you would enjoy it . I'd like to Denise , but I'm busy on friday this week and next week too .  
 Person1:      But I said thursday.The tickets are for thursday evening .  
 Person2:  Thursday ? Oh , sorry . I meant thursday too . I mean I busy then too .  
 Person1:      I see.Oh , well some other time perhaps .  
 Person2:  Yes . some other time perhaps.Thanks again . 

1