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:       You have to finish your dinner before you leave the table .  
 Person2:But , Mom , I can't eat anymore . I'm stuffed .  
 Person1:        What's the matter ? It doesn't taste good ?  
 Person2:It's not that I don't like your cooking , but I ate some cookies before we had dinner . 

formal