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 a soccer fan ?  
 Person2:Yes , I am . I like to watch soccer games on TV , but I don ’ t play . I watched every game of the 2002 World Cup .  
 Person1:        Which team is your favorite ?  
 Person2:Italian . They played very well , but they were not very lucky .  
 Person1:        I like the Brazilians . They are the real champions . 

informal