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:     Pete's Pizza , may I help you ?  
 Person2:  Yes , I have one of your buy one , get one free coupons , and I'd like to order two large pizzas .  
 Person1:      Will that be for pick-up or delivery ?  
 Person2:  Delivery , please .  
 Person1:      Can I get your phone number ?  
 Person2:  Sure . It's 2331-7600 .  
 Person1:      And your address ?  
 Person2:  2244 Forest Drive . 

1