When you respond, express that you are a reliable and hard worker. Show the interviewer that you are capable of proper time management, ensuring you complete your tasks every week within an appropriate amount of time. You can then express that you have the flexibility for situations that require your time over and above the typical work week. If you haven't had a chance to clarify the hiring company's scheduling needs, now would be the perfect time to ask. Consider asking what the scheduling expectations are for the position. If the employer expects you to work 12-hour days, it would be vital to know that before you respond with, 'Absolutely! No problem!' Be sure that you can meet their expectations. Express that you are a reliable and dedicated individual. You also want to show that you can finish your tasks in a reasonable amount of time.