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 ?  
 Person2:  Have you any package tour to Italy ?  
 Person1:      Yes , of course . Here are all the tour routes we have to Italy .  
 Person2:  How long does the route No . 5 last ?  
 Person1:      2 weeks . Is that OK ?  
 Person2:  We have just 10 days for the vacation . 

1