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:       Why don't you sit down and relax , darling ? 
 Person2:I don't want to . 
 Person1:        Well , come over and talk to me then . 
 Person2:Certainly not . 
 Person1:        May I turn on the TV then ? 
 Person2:Turn on the TV , for what ? 
 Person1:        So that we can sit down together and listen to some music . 
 Person2:Listen to the music ? And who will cook dinner , will you ? 
 Person1:        I will , but let's go to the disco after dinner . 
 Person2:To a disco ? Oh , no . You know I hate it . 

informal