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: You don't have to play that record so loud , do you ?
Person2:I'm sorry . Has it been bothering you ?
Person1: Yes . And please ask me the next time you want to use something .
Person2:I'm sorry . I meant to ask you .
Solution:
formal