How you treat your customers on Yelp is a good indicator (in the minds of your potential customers) of you how treat your customers in your restaurant. Respond early and often.

If you haven't responded to any of your negative reviews on Yelp, new customers will be hesitant of the service they'll get if they have similar experiences. Utilize public responses to show customers that you care and are willing to do whatever it takes to make it right.