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 long will it take to learn English ? Will I be able to take other courses next semester or will English take up all of my time ? 
 Person2:It ’ s hard to say . Language isn ’ t like other studies . 
 Person1:        You mean I could finish this course and still not know English ? You ’ Ve got to be kidding ! 
 Person2:I ’ m not kidding . Learning a language is a question of forming language habits and that takes time . 
 Person1:        So do we have to stay in this English class forever ? 
 Person2:No . You just have to stay here long enough to get some orientation . Then you go on practicing and learning outside . A lot of learning depends on your personal motivation . 
 Person1:        So it ’ s really the same story . Practice , practice , practice and more practice is the only way to learn a language . 
 Person2:You said it . 

informal