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:       You're being childish . Your nose will heal . And so will your pride , if you let it . 
 Person2:I'll have us ready for Stars.com by the end of next week . After that , I don't know . 
 Person1:        Don't know what ? 
 Person2:Let's just say there could be some big changes around here . 
 Person1:        Is that right ? Like what kind of changes ? 
 Person2:You'll see . Oh , yeah , you'll see . 
 Person1:        Come on , grow up . Have you seen Vince around ? 

informal