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:       She is so beautiful , isn't she ?  
 Person2:Who ?  
 Person1:        Julia Roberts .  
 Person2:Yeah , she is so charming . I like her , too .  
 Person1:        It's said that her new movie is going to come out .  
 Person2:What's the movie about ?  
 Person1:        I'm not sure .  
 Person2:Isn't it silly to see a movie that you know nothing about ?  
 Person1:        I already told you , because Julia Roberts is in it . I like her because she is not only a great actor but also is very generous to give a lot to many kinds of charities .  
 Person2:Yeah , she is great . I also admire her for her concern about society . 

informal