What department does the speaker work in?

Hello. This is Benjamin Smith from the Accounting Department. I’m calling because of the expense report you turned in for your business trip to Hong Kong last week. Your receipts for the Plaza Hotel don’t match the amount on the expense report, and the dates you wrote on the document don’t match the dates on the schedule. We’d like to repay you as soon as possible, and I’m sure you also want that. But before I approve the payment, these mistakes should be taken care of. Do you think you can drop by the accounting office tomorrow afternoon to discuss this problem? Thank you.