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:       Daniel , what are you doing here ? Aren't you supposed to be at school now ?  
 Person2:The same question to you .  
 Person1:        Well , we shall make it a secret between us .  
 Person2:Deal , Where is Gucci ?  
 Person1:        She is the cheer-leader . They are required to put on a performance . Look ! Here they come .  
 Person2:Oh , look at her . She looks like one is the basketball babies in NBA .  
 Person1:        I want to be like her .  
 Person2:Get real . Don't be so pathetic .  
 Person1:        Hey , young man ! I'm your sis . Don't talk to me like that .  
 Person2:Oh , man , look at her , go ! She is amazing ! She should be my sis .  
 Person1:        Boy , you've got such a crush on her , haven't you ?  
 Person2:Yes , I want to be her boyfriend . Just like in the movie .  
 Person1:        Are you out of your mind ?  
 Person2:She told me she liked my new haircut . She thought it was cool .  
 Person1:        Go ahead , have a try and be a joke . 

informal