Thank you for your response. Any of us that work are often in a customer situation where we want the best for our clients. First response is to apologize and second response is how do I make this customer happier about the situation by giving them a better option. The seats in business class were empty and the flight had left, they had no way to sell those seats. It would have been a very easy solution. Lastly, after the fact if not a refund for the seats it is easy to offer an upgrade on subsequent flights or offer frequent flier miles. Galling that the purser never once came by and acknowledged the situation or offered profuse apologies.