Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. You are required to assign a label 'formal' if there is an absence of emotion and a presence of questions anywhere within the conversation. If such pattern is not found assign the label 'informal'.
Input:  Person1:       Are you going to leave school at the end of the term ?  
 Person2:Yes , I am .  
 Person1:        What are you going to do ?  
 Person2:I'm going to be a clerk .  
 Person1:        What does a clerk do ?  
 Person2:He works in an office . He writes letters and reports , and he types .  
 Person1:        I want to be a vet .  
 Person2:A-what ?  
 Person1:        A vet-a veterinary surgeon .  
 Person2:Good gracious ! What's that ?  
 Person1:        A vet's a man who takes care of sick animals . He's an animal doctor .  
 Person2:I once read a story about a person who talked to animals . It was very interesting . 

formal