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:       That sounds pretty good . But isn't downloading music illegal ?  
 Person2:Not if you pay for it . For example , if you download from iTunes and pay with your credit card , it's legal .  
 Person1:        OK , I'm going to get iTunes and download some Vanilla Ice songs .  
 Person2:Awesome . You'll see that they are really catchy . 

informal