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 need some more amenities , please .  
 Person2:I'm not sure I'm following you , sir .  
 Person1:        Specifically , I'm talking about the little things , like soap and shampoo .  
 Person2:Oh , now I understand ! So , you've already used up all your amenities ?  
 Person1:        No , I'm not even halfway through my supply .  
 Person2:I'm losing you , sir . What's the problem ?  
 Person1:        What's the use of going to a hotel if you don't take home souvenirs ?  
 Person2:Okay , I got it . You're collecting souvenirs !  
 Person1:        There you go . My friends expect me to bring home souvenirs .  
 Person2:Have you visited our souvenir shop , sir ? It's loaded with all kinds of items .  
 Person1:        I've never paid for a hotel souvenir in my life , and I don't intend to start now .  
 Person2:Sir , housekeeping will bring you a basketful of amenities momentarily . 

formal