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:       Why did you choose Applied Sociology as your major ?  
 Person2:I think Applied Sociology is a practical subject that can be widely applied to research on soci-ety and man . Hence , I chose it as my major .  
 Person1:        Have you taken the course in Public Relations when you are in college ?  
 Person2:I am sorry to say I haven't , but I have taken many other courses that concerns the PR , such as Social Psychology , Public Affairs and Mass Communication . 

formal