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 , how are you doing ?  
 Person2:I'm fine . How about yourself ?  
 Person1:        I'm pretty good . Thanks for asking .  
 Person2:No problem . So how have you been ?  
 Person1:        I've been great . What about you ?  
 Person2:I've been good . I'm in school right now .  
 Person1:        What school do you go to ?  
 Person2:I go to PCC .  
 Person1:        Do you like it there ?  
 Person2:It's okay . It's a really big campus .  
 Person1:        Good luck with school .  
 Person2:Thank you very much . 

informal