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:       Come on , you must tell me everything about him .  
 Person2:Well , he's very tall and handsome .  
 Person1:        Hmm ...  
 Person2:He has big blue eyes and long blonde hair .  
 Person1:        Oh , how long ?  
 Person2:Down to his shoulders . It's beautiful , like gold .  
 Person1:        OK . OK . You'd better tell me what he does .  
 Person2:He's a very creative painter . His paintings sell well .  
 Person1:        Really ?  
 Person2:He's quite a patient teacher , too .  
 Person1:        Fine .  
 Person2:You're going to like him . Everybody says he's a nice guy . 

informal