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 so excited about Chinese New Year ! When do I get to visit Grandma ? Grandma makes the best dumplings in the world !  
 Person2:Ha ha , right . Sounds to me like you ’ re more excited about the dumplings than seeing your Grandma .  
 Person1:        Of course I miss Grandma , too . I bet she ’ s gonna teach me how to play Mahjong ! Hey , Dad , are you going to buy me firecrackers this year ? We ’ re going to have the best fireworks ! I ’ m really looking forward to lighting them !  
 Person2:Son , firecrackers aren ’ t toys.they ’ re dangerous !  
 Person1:        No , fireworks are awesome !  
 Person2:Whoa , don ’ t you remember ? Last year when I set off the firecrackers , you covered both your ears and hid behind your mother ?  
 Person1:        I was scared because ... because I saw a bug . That ’ s all .  
 Person2:Ahahah ... really ?  
 Person1:        Oh , and I can ’ t wait to watch the dragon dance ! Dad , can I sit on your shoulders this time ?  
 Person2:Hey , I offered last year ...  
 Person1:        Well , I ... anyways , I was just thinking of the red envelopes . I wanna make a list of all the things I ’ m gonna buy with my red envelope money ! I can ’ t wait ! I ’ m gonna have so much money ! Mom , can I get a pen and a piece of paper ? I want a new transformer , no , two transformers ... the Optimums Prime , and ... maybe the wheeljack ? I ’ ll get a PSP game , ahahah , and I ’ ll buy the entire class lunch at MacDonald ’ s ... 

informal