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:       My brother gave me a baby cat yesterday . I can keep it as my pet .  
 Person2:I don ’ t understand . Why do you want a cat ?  
 Person1:        Cats are beautiful and lovely , aren ’ t they ?  
 Person2:No , cats are too dirty . They are lazy and cunning . I don ’ t like them at all .  
 Person1:        I don ’ t think so . I think cats are sweet .  
 Person2:You can keep the cat , but you should keep it away from me . 

informal