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: Good morning , Miss Li .
Person2:Morning , Mike .
Person1: I'm sorry that I was absent yesterday .
Person2:I've already got your certificate for sick leave . How do you feel today ?
Person1: I feel much better now .
Person2:Have you received the reading material handed out yesterday ?
Person1: I've already got it . Thanks .
Person2:I will explain it in detail in the next class , could you preview it ?
Person1: I will .
Solution:
formal