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:       What do you usually do in your work time ? 
 Person2:Some routine job . Files , documents , faxes and so on . 
 Person1:        Are you usually busy ? 
 Person2:It depends . Sometimes I am very busy . 
 Person1:        What depends ? 
 Person2:Oh , that means I can't make sure for my own . 
 Person1:        Oh , I see . 

formal