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:       The trouble is not that . It is that he may suddenly remember something I promised him a couple of weeks ago , out of a clear blue sky . Then he complains that I have gone back on my words .  
 Person2:Does he do that with his Dad ? I mean , does he complain things to his father ?  
 Person1:        He never does , and in fact , he seldom communicates with him .  
 Person2:But didn ’ t you say that his Dad takes him under his wings ?  
 Person1:        Yes , I did . He only takes side with him . He seldom asks what Dick is doing . 

formal