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 more worried about snipers . 
 Person2:Snipers ? 
 Person1:        Sniping is when someone makes a bid at the very last minute to steal something for a bargain price . 
 Person2:So you're afraid someone is going to snipe your Buddha ? 
 Person1:        I heard about a software program called turbid . It automatically submits a bid with just a few seconds to go in an auction . 
 Person2:Count me out . I can do without shills and snipers and turbo-bidders . 

formal