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:       Jenny , you look terrible . What's eating you ?  
 Person2:Don't brother me !  
 Person1:        Hey , Chillon , I'm just trying to help .  
 Person2:Sorry , Sally , it's not your fault .  
 Person1:        So , what's the problem ?  
 Person2:I drew a blank on ~ about the test .  
 Person1:        No kidding ! Didn't you study for it ?  
 Person2:Yeah , but nothing was clear during the test .  
 Person1:        That's too bad , anyway , I'm sure things will turn around next master .  
 Person2:I'm thinking of dropping out .  
 Person1:        You can't do that , Jenny !  
 Person2:I'm dead serious about this , Sally .  
 Person1:        Come on , let's talk about it . 

informal