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 don't make idle threats .  
 Person2:I guess not .  
 Person1:        I hope you're not turning into a sissy on me , Dave .  
 Person2:Look , I want to succeed just as much as you do . Well , maybe not quite that much .  
 Person1:        If we let Vince and Elvin continue to run things , invoking is going to fail .  
 Person2:What are you trying to say ?  
 Person1:        I'm saying this ship needs a new captain . Are you with me , or aren't you ? 

formal