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:       How do you like the food sold in this sidewalk snack booth ?  
 Person2:At least , it is better than my boxed lunch at work . I'm so fed up with the bland food . Thank you for having lunch with me !  
 Person1:        Any time . But I don't mind eating boxed lunch . The food sanitation is really good too .  
 Person2:It's hard to believe that you like it . You are so easy to be satisfied .  
 Person1:        Hey , it's not that bad . The food is nutritious and it's really convenient . I don't want to spend too much time on eating stuff .  
 Person2:Eating is important . You are what you eat . It's not only a daily routine .  
 Person1:        Well , will you just go back to work after lunch ?  
 Person2:No . I'm going to pay the bill for the company's lunch .  
 Person1:        But you didn't eat anything today .  
 Person2:Well , the bill is paid by month . That's probably the only thing that I like about a take-out restaurant .  
 Person1:        All right . I'm going to the McDonald's .  
 Person2:For what ? I thought you didn't like western food .  
 Person1:        No , I never did . It's for my son . He loves it , and I made an agreement with him that he can eat it once a week .  
 Person2:That's really smart . My son Daniel is the same with your son . I just don't get it , why all the kids prefer western food to traditional food .  
 Person1:        Me , either . But , it's for sure that the children market is a really big one .  
 Person2:That's for sure . It's always hard for the parents to say no to their children . 

formal