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:       I was looking at my test score and think that it should be higher . 
 Person2:Is the math wrong or the way the answer was marked ? 
 Person1:        I think an answer got marked wrong that should have been marked right . 
 Person2:These things can happen ; let's double-check the answers first to be sure , all right ? 
 Person1:        That would be great ! 
 Person2:Look at the answer sheet and compare it to your answers . Do you see any place where I made a mistake in grading ? 
 Person1:        This one right here should be right . 
 Person2:Yeah , I see the same thing ; now we can do the math and check that , right ? 
 Person1:        Yeah , let's do the math . 
 Person2:I count all of the correct answers , total them , and divide by the total . Does this look right to you ? 
 Person1:        Looks pretty good . 
 Person2:Thank you for caring enough to check on your scores ; keep studying ! 

informal