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 want some dessert ?  
 Person2:  No thanks . We just need our check . Have you seen the waitress ?  
 Person1:      Where is our waitress anyway ?  
 Person2:  Yes , the service hasn't been the best . Is that our waitress over there ?  
 Person1:      I'll walk over and get the bill , since I don't think the waitress is coming over here any time soon .  
 Person2:  Good idea . Just bring it back and we'll figure it out together .  
 Person1:      So the bill is $ 36.00 .  
 Person2:  How much do you think we should leave for a tip ?  
 Person1:      My first inclination is to leave nothing for a tip .  
 Person2:  I agree , but we don't really know the whole story . There may have been problems in the kitchen beyond her control .  
 Person1:      Let's leave 10 % , so that we at least leave something for the service .  
 Person2:  I agree . We will leave $ 3.60 for the tip . 

1