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:       Mum , can I finish my homework later ?  
 Person2:Sorry . You know the rules .  
 Person1:        But I want to watch TV now .  
 Person2:That ’ s out of the question .  
 Person1:        Please .  
 Person2:Not a chance .  
 Person1:        Not even for an hour ?  
 Person2:Sorry , it ’ s impossible . 

informal