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'd like to check in , PLS .  
 Person2:Awfully sorry , sir . There are no rooms available now .  
 Person1:        But I ’ Ve reserved a room the day before yesterday .  
 Person2:Sorry , may I have your name ?  
 Person1:        Tony Bush .  
 Person2:Pls wait a minute , let me check . Excuse me , but I can't seem to find your name on our list . Are you sure you have a reservation for tonight ?  
 Person1:        Of course , I did it myself .  
 Person2:I am terribly sorry . There must have been some mistakes . Let me check it again . Oh , yes , there is a name listed as Tommy Bush . It must be the fault of the clerk who registered your name . I apologize .  
 Person1:        Don't worry about that .  
 Person2:According to the records , your reservation is for a single room with shower and air conditioners for two nights . The room rate will be 110 dollars per night , including 10 % tax and 4 % service charge . Is this right ?  
 Person1:        Yes , that's right . I'd like to pay my bill by credit card .  
 Person2:May I make a copy of your card ?  
 Person1:        Here you are .  
 Person2:Ok , now could you fill out this registration form ?  
 Person1:        All right .  
 Person2:Your room number is 707 . Here is your key . The bellhop will help you carry the suitcases to your room . Have a nice evening ! 

formal