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:       Let's program your courses , since you have had English literature , you should take American literature and American prose and fiction.You transcript indicate that your english background is strong , so I don't think you have any problem with it .  
 Person2:How many credits for each course ?  
 Person1:        Three , you also should take two three-credit-course in education department .  
 Person2:Thank you , sir , I'm sure I will . 

informal