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 in.Let me show you the house.Isn ' t it something ? Spacious , bright and clean.And the walls were newly painted.Have you ever seen such a nice house ?  
 Person2:Not really .  
 Person1:        This is the kitchen.Every - thing's new .  
 Person2:It's great ! 

informal