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:     Hi Colin . How are you feeling today ?  
 Person2:  Oh , I feel ok but I ’ m still very tired .  
 Person1:      It's probably jet lag .  
 Person2:  I think so . One minute I feel quite awake , and the next I feel very tired .  
 Person1:      Do you want to visit any tourist spots in the city ?  
 Person2:  Oh yes , I'm very interested in Chinese history so I ’ d like to visit the Summer Palace .  
 Person1:      Good idea . I ’ d be very happy to go there . 

1