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 , are you Sara Wilson ?  
 Person2:  Yes , I am . You must be Tom . Nice to meet you .  
 Person1:      Nice to meet you too . Let me help you with your bags .  
 Person2:  Be careful , Tom . Those are pretty heavy .  
 Person1:      Wow , you're not kidding . Hold on a second . Hello , could you give us a hand , please ? 

1