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:       Gordon , you're ever so late .  
 Person2:Yes , I am sorry . I missed the bus .  
 Person1:        But there's a bus every ten minutes , and you are over 1 hour late .  
 Person2:Well , I missed several buses .  
 Person1:        How on earth can you miss several buses ?  
 Person2:I , ah ... , I got have late .  
 Person1:        Oh , come on , Gordon , it's the afternoon now . Why were you late really ?  
 Person2:Well , I ... I lost my wallet , and I ...  
 Person1:        Have you got it now ?  
 Person2:Yes , I found it again .  
 Person1:        When ?  
 Person2:This morning . I mean ...  
 Person1:        I am not convinced by your explanation . 

informal