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:       It rumored that Jean is fooling around with another woman's husband .  
 Person2:You gossip ! What's the basis of your opinion ?  
 Person1:        Someone declared that he saw it .  
 Person2:I don't believe it . Jean is such a kind lady . How could she do this ?  
 Person1:        Who knows ? You can't judge a book by its cover .  
 Person2:Maybe ! 

informal