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:       You ran into my car .  
 Person2:That was my fault . I'm sorry .  
 Person1:        You messed up my car .  
 Person2:I don't see any damage .  
 Person1:        My rear bumper is messed up .  
 Person2:I don't see anything wrong with it .  
 Person1:        It's smashed in .  
 Person2:That's not my fault .  
 Person1:        The same thing is wrong with your bumper .  
 Person2:I'll take care of everything . I just need your phone number and insurance .  
 Person1:        I need your information too .  
 Person2:Here you go . 

informal