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:       You should have seen the line at the housing office.It took me an hour to make my dormitory deposit for next year . Have you made yours yet ? 
 Person2:No , I ’ m not sure I ’ m going to . 
 Person1:        Why not ? There ’ s not much time left . Are you short of cash ? 
 Person2:No , thanks . I am okay . 
 Person1:        You ’ d better hurry up if you wanna a dorm room next September ... 
 Person2:Well , actually , I am thinking about living off campus . 
 Person1:        Do you have any idea how much that would cost ? 
 Person2:I know it would be more expensive . I think I could handle it though . It ’ s that this dorm is so noisy that I can ’ t get anything done . 
 Person1:        You should study in the library the way I do . Think of the money you ’ d save . 
 Person2:I ’ Ve got to think it over some more . 
 Person1:        I hope you will have second thoughts . 

formal