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:       I have never seen so many flavors of ice cream in one place ! 
 Person2:There certainly are a lot . Can you choose a favorite ? 
 Person1:        Vanilla with toppings is my favorite . 
 Person2:Is there anything as good as a hot fudge sundae ? 
 Person1:        No way ! Do you have a flavors you don't like ? 
 Person2:I don't like ice cream with too many different flavors in it . 
 Person1:        I agree with that , it just doesn't work for me . 
 Person2:I saw garlic ice cream on the menu once . 
 Person1:        I think that would be horrible ! 
 Person2:I think I'll stick with a more traditional choice today ! 

informal