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:       My father ’ s angry face always makes my blood run cold . 
 Person2:You mean that he is bad-tempered and often gets angry with you . 
 Person1:        Not often . Just when I make mistakes . 

informal