Detailed Instructions: 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'.
Problem: Person1: Professor , I am going to need to leave class early today .
Person2:What is the problem ?
Person1: I need to go to the airport to pick up a relative .
Person2:Are you planning on having someone take notes for you ?
Person1: Yes , I've got that part covered .
Person2:When , exactly do you need to leave ?
Person1: I don't need to leave until the very end of class .
Person2:Fine , but next time try and not have to miss class again .
Person1: Thanks , Professor . See you later !
Person2:See you later ! Drive carefully .
Solution:
informal