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:       I couldn't look at you , and say you aren't beautiful ! 
 Person2:You are pretending ! 
 Person1:        No , Miss Anna , you must let me say how lovely you are ! What's wrong with that ? 
 Person2:It's wrong because---it isn't true . 
 Person1:        You know that everybody notices how beautiful you are , don't you ? 
 Person2:Well , no-that is , I've heard Linda say they do , but ... Thank you . But please don't speak to me again . 
 Person1:        Oh , Miss Anna ! That's too hard ! I won't be here long . 

informal