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:       Could we go over some things , because I think my test score is wrong .  
 Person2:What do you think is wrong , the math or the way your answer was scored ?  
 Person1:        Both .  
 Person2:I am willing to take a second look because teachers make mistakes , too . Will that work for you ?  
 Person1:        Yeah , I'm ready .  
 Person2:Check your answers against the ones on the answer sheet and let me know where you see the mistake .  
 Person1:        These look strange .  
 Person2:Yes , I agree ; let's move on to the calculating of the score . Would that be OK ?  
 Person1:        OK , let's do the calculation .  
 Person2:We add all of these up and divide by this and that gives us this percentage .  
 Person1:        I see .  
 Person2:Anytime you have a question , please feel free to ask ! 

formal