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:     Do you have a reservation , sir ?  
 Person2:  No , I am afraid we don't .  
 Person1:      I'm sorry . The restaurant is full now . You have to wait for about half an hour . Would you care to have a drink at the lounge until a table is available ?  
 Person2:  No , thanks . We'll come back later . May I reserve a table for two ?  
 Person1:      Yes , of course . May I have your name , sir ?  
 Person2:  Bruce . By the way . Can we have a table by the window ?  
 Person1:      We'll try to arrange it but I can't guarantee , sir .  
 Person2:  That's fine . 

1