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:       Which season do you like best ?  
 Person2:I like spring best . It is neither too cold nor too hot . Freezing days make me lazy and stuffy days make me lazier . How about you ?  
 Person1:        I prefer summer , especially the summer evenings . When the sun comes down , it is so nice to take a walk and breathe . After a rain shower , the smell of the air is refreshing . It is also a best reason for ice-cream .  
 Person2:How do you get through the stuffy daytime ?  
 Person1:        Well , I have to hide in the air-conditioned rooms . Anyway , it is all worth , just think about the cool evening time . 

formal