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'm sorry for being late . 
 Person2:You're supposed to stand here quietly until the flag - raising ceremony is over . 
 Person1:        About what time can I go to my own class ? 
 Person2:When everything is over . 
 Person1:        Now that it is all over . can I go now ? 
 Person2:Not yet . You should stand still for another few minutes . Late-comers must be recorded . 
 Person1:        That's too bad ! 

formal