What is the purpose of the announcement?

First I want to inform you of the good news that we have doubled our sales over the last 6 months.(72)Yes, we have more than fulfilled our growth target, and it is with great pleasure that I congratulate you for your effort and the care you have taken in making this happen.(71)In order to recognize this achievement and your performance, we have decided to invite all employees and their families to a special thank-you buffet lunch at the Criterion Hotel. Please join us this Saturday for some excellent food and wine.(73)I hope to see you all there!