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:       Hey Annie , who is this picture of ?  
 Person2:Oh , that's my great , great , great , great , great , great , great grandfather .  
 Person1:        I think you can say your seventh great grandfather ! Cutie ! What's his name ?  
 Person2:Peter Madsen . A great A if I do say so myself .  
 Person1:        Nice pun . What is it you active about him most ?  
 Person2:He loved his family and his countrymen and his freedom .  
 Person1:        He looks like a very personable man .  
 Person2:He was . He was friendly toward and showed concern for everyone he met . 

informal