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:       What do you think of the new television channel ? Aren't the programs awful ?  
 Person2:I quite agree with you . They are terrible . They are complete waste of time , but my wife disagrees with me .  
 Person1:        Actually , what bothers me is the violence . There are far too many detective and police shows .  
 Person2:I couldn't agree with you more . There aren't enough educational programs , and even the news shows are not well done .  
 Person1:        You are absolutely right . They are too brief . They don't tell you anything . 

informal