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:       Hi ! It's still seven o'clock . Are you crazy ?  
 Person2:I got the information that there is a killer sale at the shopping mall near our block . Get up and I will wait for you at the gate of our flat .  
 Person1:        Every time when you glimpse some stylish clothes , you change into another person .  
 Person2:Stop complaining , OK ?  
 Person1:        No wonder you are named shopaholic .  
 Person2:No , I am not a shopaholic , but a super shopaholic . And I really enjoy smelling the gorgeous clothes and new bags .  
 Person1:        Wait a moment . And you can check where other sales are . 

formal