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 have something really cool to tell you about ! Do you know anything about online auctions ? 
 Person2:Not really . 
 Person1:        They're awesome ! I was browsing through the eBay auction today , and I found the cutest fat little copper Buddha ! It's over a hundred years old . 
 Person2:Please don't tell me you bought it . 
 Person1:        Why not ? 
 Person2:If you did , you probably got ripped off . 

formal