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:       Hi , Sue . What's up ?  
 Person2:Hey , Andrew . How's everything with work ?  
 Person1:        Ok , I guess . My boss has been on my back recently .  
 Person2:Really ? What's he been doing ?  
 Person1:        You know , just giving me lots to do . I'm really busy right now .  
 Person2:Are you ? What are you busy with ?  
 Person1:        Oh , lots of things . Mostly training new people . 

informal