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:       Jack ! Do you want to see a picture of my new puppy ?  
 Person2:Sure . I thought people only showed off pictures of their new babies , not new pets !  
 Person1:        Well , this is my new baby . He ’ s just as much trouble . That ’ s for sure ! But , he ’ s a lot of fun !  
 Person2:I see what you mean . He ’ s really cute . How old is he ? 

informal