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 courses did you major in ?  
 Person2:I took more than 10 subjects including Theoretical Economics , Political Economics , Western Economics , Statistics and so on . In addition to the courses of my major , I took minor courses too .  
 Person1:        What courses did you minor in ?  
 Person2:I took computer science and English courses as my minor subjects . 

formal