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:       Which kinds of meat are most popular in your country ?  
 Person2:We eat a lot of chicken , pork and beef . You eat those meat a lot in your country too , don ’ t you ?  
 Person1:        Yes , we do . We also eat a lot of lamb .  
 Person2:yes . I ’ Ve heard that people in your country like to eat lamb chops .  
 Person1:        That ’ s right . They tastes so good ! We eat them with mint sauce . Have you every tried them ?  
 Person2:Yes , I have . I tried them when I visited your country last year . I thought they were very tasty . Can you cook them ?  
 Person1:        I certainly can . If I can get some from the butcher ’ s , I ’ ll cook them for you .  
 Person2:That sounds great . I'll bring a bottle of wine . 

informal