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:       That's right . Once the contract with Stars.com is final , we'll deal with Zina . 
 Person2:I can't wait to see the expression on her face when we dump her . 
 Person1:        Don't jump the gun . She's in the driver's seat right now . You have to be patient . 
 Person2:Don't worry . I'm patient , but vengeance will be mine . 
 Person1:        Settle down , Elvin . If you're not careful , you'll give our plan away . Zina's smart , you know . 

informal