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 watching the soccer match tonight ? It must be the most exciting one in this season .  
 Person2:Well , of course I can ’ t miss it . Which team are you for ?  
 Person1:        Manchester United . What about you ?  
 Person2:Me too . Do you think they are going to get the championship this time ?  
 Person1:        I have confidence in them . 

formal