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 shouldn't have told her the truth.What can we do now ? 
 Person2:I'm sorry , It's all my fault . 
 Person1:        You are always like this . I've told you many times not to tell her . 
 Person2:Sorry , I had no intention . 
 Person1:        It's too late to say sorry now.Oh , what am I going to do ? 
 Person2:I know I was an idiot , But if there is anything I can do to make up , Please do tell me . 

informal