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:       He has come to life in the end .  
 Person2:Oh , thank God . We all felt frightened by the bad new about him .  
 Person1:        Yes . Fortunately , an ambulance passed in the nick of time , and we got him away to hospital .  
 Person2:Right . Unless , who know what will happen .  
 Person1:        Wish him to be healthy soon . 

informal