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:       Hey , Lily ! You won't believe what happened in class today !  
 Person2:What ?  
 Person1:        A man sent Miss Smith flowers , and Bryan got kicked out of class !  
 Person2:Cool ! I wish I could have been there !  
 Person1:        Me , too . I miss you . Are you any better ?  
 Person2:Yes . But if I have any more soup , I think I'll die . 

informal