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 a sweet tooth . I can not help but think about having something sweet between meals .  
 Person2:A new candy shop just opened around the corner last week . They have a variety of candies and it is always full of people .  
 Person1:        That sounds really attractive . Let's go to that candy shop now .  
 Person2:Are you serious ? It is always crowded with many people .  
 Person1:        why not ? I would like to buy some candies . Since there are so many people , I think they must have delicious candy .  
 Person2:Look at the candy bar over there . It is so colorful and tasty .  
 Person1:        They have lollypops , chocolate drops , fruit candy , mints , pearbrittles and toffee . They are in different colors and flavors .  
 Person2:I want to get a big bag and buy a little of everything .  
 Person1:        Me too . I finally understand why a small shop like this can always befilmed with dozens of people .  
 Person2:To be honest , I care only about whether I can have some delicious candy eat . I couldn't care less about whether the shop is popular or not .  
 Person1:        You are a candy terminator . Be careful or you'll get a lot of cavities .  
 Person2:That is true . Speaking of cavities , I am starting to feel something is wrong with my teeth now . Let's get more strawberry chocolate drops before we go home .  
 Person1:        You really can't live without candy . 

informal