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:     Good afternoon , madam . Can I help you ?  
 Person2:  Yes , please . Have you any vacancies for tonight ?  
 Person1:      Do you have reservations with us ?  
 Person2:  No , I don't think so .  
 Person1:      Sorry , madam . We don't have vacancies at the moment . 

1