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:       This'd better be good . I'm about to fire you all and find another company . 
 Person2:We've brought you a little something from the place down the street , Kitty Cafe-Jamaican Blue Mountain coffee beans ! 
 Person1:        Mmm , smells good . Sure better than my instant . But please don't tell me this is another coffee-themed pitch . I thought I told you ... 
 Person2:... yes , but this one has an all-new buzz . 

informal