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:       Brad , wait !  
 Person2:What ?  
 Person1:        How come you have a locker but I don't ?  
 Person2:Mr . Rogers probably forgot to assign a locker to you .  
 Person1:        I had to carry my backpack with me all day .  
 Person2:Remind him to give you a locker tomorrow .  
 Person1:        Does it have a lock ?  
 Person2:No . You have to buy your own . You'll have to go to a hardware store to pick one up . 

formal