What would you do if a customer asked for a free dish?

By this question, the interviewer wants to know if you are familiar with the policies of the store and how much you are prepared to enforce them.

I have been in situations where customers asked for freebies, but I always make clear the store policies to them and that there is a charge for it. I will inform the customer about its price and confirm if they still want it. However, if they still insist, I will seek help from my manager.