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:       What kinds of meat are most popular in your country ?  
 Person2:We usually eat chicken , pork and beef . You eat these meats a lot in your country too , don't you ?  
 Person1:        Yes , we do . We also eat mutton .  
 Person2:I've heard that people in your country like mutton chops .  
 Person1:        That's right . Mutton chops taste so good . We eat them with sauce . Have you ever tried ?  
 Person2:Yes , I have . I tried once when I visited your country last year . I think they were very tasty . Can you cook them ?  
 Person1:        Certainly I can . I'll buy some from the butcher's and cook for you next Sunday .  
 Person2:That sounds great . I'll bring a bottle of wine then . 

informal