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 quite upset ! I want a new room and a refund for tonight .  
 Person2:Forgive me , sir , I haven't been told what the problem is .  
 Person1:        I'm about to be swept away by millions of cockroaches !  
 Person2:My apologies , sir . We'll transfer you to a new room at once and give you a full refund .  
 Person1:        Thank you . I didn't want to have to take this to court .  
 Person2:Sir , we never want a guest to stay here mad or unhappy . 

informal