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:       Have you read all these crazy things that are going on around the world ?  
 Person2:What do you mean ?  
 Person1:        I was reading about how some people get tricked or drugged in their hotel rooms and have their organs removed ! Then they are sold on the black market .  
 Person2:Don't tell me you actually believe all that ? Don't be so gullible , they are just urban legends . They are just stories people make up to scare you .  
 Person1:        Well , I was also reading about how some popular songs have subliminal or even satanic messages if you play them backwards ! Can you believe that ?  
 Person2:You really think an artist or song writer is going to go through the trouble of putting subliminal or satanic messages in a song ? Don't be so naive !  
 Person1:        Well maybe you are right , but how about the story of how KFC has rows of headless chickens which are super grown in order to get bigger chickens faster !  
 Person2:Sounds a bit too far fetched to be true , don't you think ? 

formal