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:       You ’ re going to set up your own law office , aren ’ t you ? 
 Person2:Yes . After so many years of hard work , I ’ d rather I had an office of my own . 
 Person1:        If you need help , don ’ t hesitate to ask me . 
 Person2:I ’ ll be very glad if you would help . 
 Person1:        I ’ d like to wish you every success in your new venture . 
 Person2:Thank you . I wish I would . 
 Person1:        Good luck to you . 

informal