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:       Hello , this is Mr . Smith in Room 502 . Please send up a bellboy . I'm checking out . What time is checking out time ?  
 Person2:Checking out time is twelve . Guests will avoid an additional days room charge by checking out on time .  
 Person1:        It's nearly 12:00 now . Will I be charged extra ?  
 Person2:We won't charge any extra if you'd vacate the room by two o'clock .  
 Person1:        Thank you very much . May I leave my baggage here until Thursday ?  
 Person2:Yes . We can put it in our storage room .  
 Person1:        Will there be any extra charge ?  
 Person2:There will be no charge on baggage left by guests who have checked out .  
 Person1:        I see . Please prepare my bill and I will be right down to pay it . 

informal