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:       What do you make of the case ?  
 Person2:If you ask me , I don ’ t think it ’ s guilty .  
 Person1:        What do you mean by saying so ?  
 Person2:I mean it ’ s not his fault .  
 Person1:        Oh , yeah ?  
 Person2:Yes . Don ’ t you think he should be pitied rather than accused ? 

formal