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: Mr . Emory ? I ' d appreciate it if you would look over these letters before you leave today .
Person2:I ' d be glad to . Just leave them on my desk . I didn ' t expect you to finish so soon .
Person1: Thank you , sir . I ' ll leave them here . If there are no problems , I ' ll mail them out this afternoon .
Person2:Great . Good work .
Solution:
informal