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:       Mom , have we got any cookies ?  
 Person2:Cookies ? You just ate an hour ago .  
 Person1:        I know , but I'm hungry .  
 Person2:Well , why don't you have some fruit instead ?  
 Person1:        Aw , Mom . I don't want fruit , Aren't there any chocolate chips ? 

informal