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:       Good afternoon , San Felice Hotel . May I help you ? 
 Person2:Yes . I'd like to book a room , please . 
 Person1:        Certainly . When for , madam ? 
 Person2:March the 23rd . 
 Person1:        How long will you be staying ? 
 Person2:Three nights . 
 Person1:        What kind of room would you like , madam ? 
 Person2:Er ... double with bath . I'd appreciate it if you could give me a room with a view over the lake . 
 Person1:        Certainly , madam . I'll just check what we have available . . . Yes , we have a room on the 4th floor with a really splendid view . 
 Person2:Fine . How much is the charge per night ? 
 Person1:        Would you like breakfast ? 
 Person2:No , thanks . 
 Person1:        It's eighty four euro per night excluding VAT . 
 Person2:That's fine . 
 Person1:        Who's the booking for , please , madam ? 
 Person2:Mr and Mrs Ryefield , that's R-Y-E-F-I-E-L-D . 
 Person1:        Okay , let me make sure I got that 
 Person2:Yes it is . Thank you . 
 Person1:        Let me give you your confirmation number . It's 7576385 . I'll repeat that , 7576385 . Thank you for choosing San Felice Hotel and have a nice day . Goodbye . 
 Person2:Goodbye . 

formal