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:       I am thinking about resigning from my current job . 
 Person2:Have you thought about it seriously ? 
 Person1:        Yes , I have been thinking about it for quite a while . Now I finally make up my mind to leave . I have given my resignation letter to our boss last Friday . 
 Person2:Ok , did you find a new company ? 
 Person1:        Yes , I will move on to XYZ Company . 
 Person2:Good for you , but your leaving will be a great loss to us . It is so nice to work with you . 
 Person1:        Thanks . I had learned so much from you and our colleagues . 

formal