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:       Do you like watching the Winter Olympic Games ?  
 Person2:Of course . It's the tradition game in winter , and with good reason . Don't you like watching it ?  
 Person1:        Of course I do . I love it . All the games are exciting and the competitors are respectable .  
 Person2:That's true . For various reasons , it takes more to hold a fierce game for Winter Olympics than it does for Summer Olympics . You know , the low temperature may cause many problems .  
 Person1:        Yeah . What's the difference between the Winter Olympics and the Summer Olympics ?  
 Person2:When the Olympic Games started in modern times , only summer events were included . When it grew popular , there came the Winter Olympic Games , which includes a variety of winter sports .  
 Person1:        I see . Then , what's your favorite winter sport ?  
 Person2:Figure skating . In my eye , nothing beats it .  
 Person1:        Then you must know Shen Due and Hao Hongbo .  
 Person2:Oh , I didn't expect you to know them . But yes , I love them not only because of many medals they've won , but also because of their spirits .  
 Person1:        You should go to talk with May . She is a big fan of them too .  
 Person2:Sure . What about you ? What do you like about the Olympics ?  
 Person1:        For me , the Olympics for the disabled always catches my heart . It makes me understand that perseverance makes the impossible possible .  
 Person2:Hey , young man , you are so deep today .  
 Person1:        I always am . You just didn't notice . 

informal