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:       Dad , what are we doing tonight for fun ?  
 Person2:We're going over to Mrs . Smith's place to help her with her yard work .  
 Person1:        Yard work ? I said ' what are we doing for fun ' , not work !  
 Person2:It will be fun . And besides , you'll be in the best company .  
 Person1:        Dad . You're so cute . What do I need to do to help get ready ?  
 Person2:You could get the rakes and some shovels together and I'll put them in the car .  
 Person1:        Jeans and a tee shirt , right ?  
 Person2:Yes and maybe a jacket in case it gets cool . 

informal