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:       do you like animals ? I really like dogs .  
 Person2:so do i . I don ’ t like cats .  
 Person1:        why ? I think cats are ok .  
 Person2:I can ’ t bear being near cats . They don ’ t seem to like me either .  
 Person1:        I like wild animals . I don ’ t like spiders and snakes . I think spiders and snakes are disgusting .  
 Person2:I ’ m fond of snakes . I think they ’ re great . I agree with you about spiders though . I think spiders are horrible . I think it ’ s because they have so many legs .  
 Person1:        I think bears are wonderful . Pandas are fantastic . I low the people who kill them for their fur .  
 Person2:I agree . I ’ m carry about mice . I think they ’ re so cute !  
 Person1:        really ? I don ’ t see the attraction . I ’ m afraid of mice . 

formal