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:       What's your new girlfriend like ?  
 Person2:Katherine ? Well , she's good at languages .  
 Person1:        Does she know how to speak Spanish ?  
 Person2:She knows how to speak Spanish and Japanese .  
 Person1:        Wow ! ! !  
 Person2:And she's good at sports , too . She knows how to play tennis and basketball .  
 Person1:        That's terrific !  
 Person2:But there's one thing she's not good at .  
 Person1:        What's that ?  
 Person2:She's not good at remembering things . We have a date , and she's an hour late ! ! 

informal