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:       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 ! 

informal