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:       I heard that Jim lost 100 yuan . Do you know that ?  
 Person2:I don't know .  
 Person1:        Really ?  
 Person2:Yes .  
 Person1:        But some classmates said you took the money .  
 Person2:It is not true .  
 Person1:        Look at my eyes .  
 Person2:Well , I confess . I did it , because I urgently need money to buy some medicine for my mother for she is badly ill . I'm ashamed that I did that .  
 Person1:        Return the money to Jim and make an apology . I think he will forgive you .  
 Person2:I will . 

informal