Perform a detailed audit of travel-related expenses incurred by employees of [Company Name] during the last quarter. Identify any irregularities, overcharges, or duplicate submissions in the expense reports. Provide a comprehensive report on findings, and categorize them by expense type (flights, accommodation, meals, etc.). For any discrepancies, suggest actions to recover funds and improve the accuracy of future expense reporting. Highlight any trends that could indicate broader issues with compliance or reporting standards.