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:       John , my father isn't there at all . Are you kidding ?  
 Person2:Poor fellow ! What's the date today , buddy ?  
 Person1:        It's ... OH , it's the first of April , April Fools ' Day .  
 Person2:You forgot all about it , didn't you ? 

formal