Final answer:
When you don't know an answer, inform the customer you will find out and follow up promptly, marking the calendar to remember, and make a phone call if necessary to get the accurate information.
Step-by-step explanation:
If a customer walks into the office asking for the deadline to file a permit application, and you do not know the answer, it would be best to inform them that you will find out and get back to them as soon as possible. Assure the customer that you are taking their request seriously and will provide them with the accurate information they need. It is important to make a note to mark your calendar so that you do not forget to follow up. A phone call or email to the right department will likely be necessary to obtain the correct deadline information.