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:     What are you looking for ? 
 Person2:  I lost one of my contact lenses , and I ’ m searching high and low for it . 
 Person1:      Where did you lose it ? Maybe I can help you to find it . 
 Person2:  Thank you very much . I think I lost it near the window . 

1