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:       How do I set up an email account ? 
 Person2:Oh , that ’ s easy . Go to yahoo.com . Now , click on the link with the picture of an envelope . 
 Person1:        Which link ? 
 Person2:That one , the one that says , “ Mail . ” 
 Person1:        Oh , no . What did I do ? It ’ s asking me for a password . 
 Person2:Don ’ t worry . See where it says , “ New User ” ? 
 Person1:        Yes . 
 Person2:Click on that . 
 Person1:        Oh , I see . 
 Person2:Yeah , just fill out this form and choose a password . The computer will do the rest . 

informal