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:       How about you , Chuck ? Where did you grow up ?  
 Person2:Well , I was born in Ohio , but I grew up in Texas .  
 Person1:        And when did you come to Los Angeles ?  
 Person2:In 1978 . I went to college here .  
 Person1:        Oh . What was your major ?  
 Person2:Drama . I was an actor for five years after college .  
 Person1:        That's interesting . So why did you become a hairdresser ?  
 Person2:Because I needed the money . And because I was good at it . Look ! What do you think ? 

informal