Being adaptable and diplomatic are two desirable traits in any position. While the most appropriate answer will differ from company to company, showing your thought process is the main concern.
Demonstrate your listening ability and adaptability by indicating that you'll ask the right questions. Instead of saying, 'We don't do that style here,' you can highlight your customer service ability by saying something more encouraging. You want to strike a balance between pleasing the customer to secure his business and pleasing the business by reducing disruptions to normal operations.