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:     Hello ? Is that Mark ?  
 Person2:  How are you ? I haven't heard from you in ages .  
 Person1:      I've been overseas , So have you been busy lately ?  
 Person2:  Pretty busy.So are you back for good ?  
 Person1:      Yes , I was just wondering when you'd have time to go fishing .  
 Person2:  Well , I'm not working on the weekend , so we could grab some beer , ice and our fishing rods , and head out to the river .  
 Person1:      That sounds good . I've missed you my friend .  
 Person2:  Same here . 

1