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:       Farmington ? Would you take a look at these catalogue ads that Roger did ? I don ’ t think we can use them .  
 Person2:Hmm . I see what you mean . Have you spoken with Roger ? He usually does better work than this .  
 Person1:        I know , Mr . Farmington . But , I ’ m not sure that I should bring this up with him . I think it would be better if you spoke to him .  
 Person2:All right . Leave these ads with me . I ’ ll speak to him this morning . 

formal