Instructions: 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:       Hello . Holiday Inn . How can I help you ?  
 Person2:Yes . I booked a single room in your hotel for this Friday . But I ’ m sorry to say that I have to cancel it . My wife is very sick now . I don ’ t think she ’ ll be able to travel by this Friday .  
 Person1:        Oh , I ’ m sorry to hear that .  
 Person2:Thank you . Can I cancel my reservation ?  
 Person1:        Certainly . May I have your name , please ?  
 Person2:My name is Tom Smith .  
 Person1:        Okay . I have canceled your reservation , Mr . Smith .  
 Person2:Thank you very much .  
 Person1:        You ’ re welcome . I hope your wife is feeling better soon . 
Output:
formal