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 madam . What can I do for you ?  
 Person2:Hi . I want to check out . My room is 1005 .  
 Person1:        OK . Please hold on a minute . So you checked in on Monday and stayed 3 nights in single room 1005 . Is that right ?  
 Person2:Yes . Can I have a look at my bill ?  
 Person1:        OK . Here you are . If there are no questions , could we have your signature in the blank below ?  
 Person2:OK . I would like to have my receipt report , please .  
 Person1:        Here it is . We are pleased to serve you here and we look forward to seeing you again . Wish you have a good day . 

informal