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 Miss Sherman . What seems to be the problem ?  
 Person2:Well , apparently I ’ Ve run up quite a bill . I was under the impression that the Junior Executive Holiday Package only cost 250 dollars per night . I ’ Ve just been informed that it ’ s actually 500 do  
 Person1:        That ’ s true . For the Junior Executive Room ... three nights ... yes , your bill should be $ 1,500  
 Person2:But I definitely was led to believe that a three-night stay would be $ 750 .  
 Person1:        The advertised rate is based on double occupancy .  
 Person2:When I booked the room , your staff didn ’ t mention this . And the brochure and your promotional mailings do not mention that .  
 Person1:        Are you quite sure ?  
 Person2:Yes . Have a look .  
 Person1:        I see . I had no idea our advertising was so misleading . It is here , but it ’ s in the fine print on the last page .  
 Person2:Perhaps you could arrange to provide me with a new bill that reflects the advertised rate .  
 Person1:        Normally I couldn ’ t do that . But under the circumstances , I ’ ll see what I can arrange.Customer satisfaction is our primary aim .  
 Person2:Thank you . 

informal