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'.

Example Input: Person1: Mom , why do chinese people like to touch my head ? sometimes they even touch my cheeks .
Person2:That is a part of chinese culture , if they think you are a lovely child , they touch your head and say , how cute you are .
Person1: But i donor like it , not a bit , i am not a pet , i am a girl .
Person2:Well , you get used to it , different countries have different manners .
Person1: But i do not like anyone touch my head .
Person2:They are just been in friendly , when you are in Roman , do as the Romans do , that means you need to adapt to your enviroment .
Person1: What if everybody in the wheres goes crazy ?
Person2:Then you might need to pretend to be a little crazy .
Person1: Does this mean that if i might want those new European bitches , i am supposed to wonder run reget ?
Person2:Do you think it is a ~ got give your brain , use it if you really cannot accept it people touch your head , keep distance from them , why not just wear your big flyby hat and ~ is anyone get close to you .
Person1: That is my work , i will try it .
Example Output: formal

Example Input: Person1: Excuse me , I bought this sweater yesterday . But when I got home and tried it on , I found it ' s too small .
Person2:Do you have the receipt with you ?
Person1: Yes , here you are .
Person2:Thank you . Do you want your money back ?
Person1: No , can I exchange it for a bigger one ?
Person2:I am afraid this is the biggest size we have .
Person1: Oh , that's too bad .
Person2:Maybe you would like to try this one with the willow pattern . The price is the same and it's bigger .
Example Output: formal

Example Input: Person1: Are you doing the football pools , Brian ?
Person2:Yes , I ' Ve nearly finished , June . I ' m sure we will win something this week .
Person1: You always say that , but we never win anything ! What will you do if you win a lot of money ?
Person2:If I win a lot of money , I shall buy you a mink coat .
Person1: I don ' t want a mink coat ! I want to see the world .
Person2:All right . If we win a lot of money , we shall travel around the world and we shall stay at the best hotels . Then we will return home and buy a big house in the country . We will have a beautiful
Person1: But if we spend all that money we shall be poor again . What will we do then ?
Person2:If we spend all the money , we will try and win the football pools again .
Person1: It ' s a pleasant dream , but everything depends on if !
Example Output:
informal