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 . And I'm going to be Vice President of Marketing .  
 Person2:Way to go , Mary . A lot has happened during the last few months , hasn't it ?  
 Person1:        You can say that again !  
 Person2:What's up with Vince and Elvin ?  
 Person1:        They work for Zina now .  
 Person2:And they're happy with that ?  
 Person1:        They're in awe of her . After they saw how she crushed WebTracker ... but I guess you know all about that . 

formal