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:       Do you have any idea what time it is ? 
 Person2:My bad . I didn't realize that it was so late . 
 Person1:        Do you really think that that excuses your tardiness ? 
 Person2:Of course not . I really did lose track of time . 
 Person1:        Didn't I tell you to call when you're running late ? 
 Person2:Yeah , you did . I just forgot to call . 
 Person1:        It doesn't matter , you should have called and let me know . 
 Person2:That's true . My bad for not calling . 
 Person1:        If you do this again , don't even bother coming home . 
 Person2:You're going to kick me out over this ? 
 Person1:        Exactly , maybe that'll teach you to respect my rules . 
 Person2:Well , if I'm not living here anymore , then I won't have to listen to your rules . 

informal