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:     May I help you , sir ? 
 Person2:  Yes , I'd like some information about the trains to Beijing . 
 Person1:      When do you want to go ? 
 Person2:  On July 7 , I have to be there well before twelve o ’ clock . 
 Person1:      There ’ s a train at 7 a . m . It'll get you there at 11 a . m . But there are many stops along the way . 
 Person2:  And I have to get up early , too . Are there any non-stop trains to Beijing ? 
 Person1:      Yes , there is one at 8: 30 a . m . That arrives at 11:35 a . m . 

1