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:       I know I ’ m going to bite the dust going down this hill . I almost got killed on the chair lift ! This is going to be so embarrassing .  
 Person2:Don ’ t worry . Everyone knows you ’ re getting your feet wet . I ’ ll show you how . I bet you ’ ll be proficient at this in five minutes .  
 Person1:        This is only your second time skiing . This is definitely a case of the blind leading the blind .  
 Person2:Relax . I can hold my own . Now , point your skis toward the bottom of the hill . Easy does it !  
 Person1:        I don ’ t think I can get up enough nerve to do this .  
 Person2:Here . I ’ ll just give you a little push ...  
 Person1:        No ! ! !  
 Person2:There . Now , wasn ’ t that fun ? As soon as you get a second burst of energy , we ’ ll ...  
 Person1:        Don ’ t hold your breath ! 

informal