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:       Hi , Tony . You look unhappy . What's wrong ?  
 Person2:Oh , Steven , I made a big mistake .  
 Person1:        What happened ?  
 Person2:I really wish I hadn ’ t done it .  
 Person1:        What on earth are you talking about ?  
 Person2:I got caught cheating . I feel so ashamed . The teacher saw me and told me I failed .  
 Person1:        What were you thinking ?  
 Person2:You know my father . If I fail , he'll kill me . I have to do well .  
 Person1:        But what you should do is study hard .  
 Person2:I know ... I know ... it's all my fault . I feel awful that I didn ’ t study , and I cheated , and I got caught .  
 Person1:        So long as you learn from your mistakes . 

informal