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:       Thanks for inviting me to work out with you , Joan .  
 Person2:Don't mention it , let's go in .  
 Person1:        Yeah , this place looks great . Wow , look at her , she can certainly get down , can't she ?  
 Person2:She sure can . Are you jealous , Leslie ?  
 Person1:        A little , I wish I could do that .  
 Person2:You can ! With a little practice .  
 Person1:        Look at him , he's buff .  
 Person2:I think he's hot too .  
 Person1:        How do they all get in such tiptop shape ?  
 Person2:Exercised over and over . Exercise is a key .  
 Person1:        That's it . I decided to turn over a new leaf . I'm going to exercise every single day .  
 Person2:Good for you , Leslie ! 

informal