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: Hi , Mary . You look pale today . What's the matter with you ?
Person2:I think I've caught a cold . Now I'm aching all over .
Person1: You'd better take some medicine and have a good rest . I hope you'll be yourself pretty soon .
Person2:Thank you . I suppose I should go to see a doctor .
Solution:
formal