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 new computer software is driving me crazy ! I really need a break !  
 Person2:I know what you mean , Carol . I ’ Ve had nothing but trouble with it . They say it ’ s supposed to be easy !  
 Person1:        That ’ s what I ’ Ve heard . But as far as I ’ m concerned , it takes a genius to figure it out . Can you pass the sugar , please ?  
 Person2:Sure . Why don ’ t you sit down for a minute ? You haven ’ t taken a rest all morning . 

informal