Dear (employee name):. This retention bonus agreement defines each aspect of your continued employment at (Company Name)." Emphasize the Employee's Value. I am writing to inform you that, in appreciation for your continued support of Alexza Pharmaceuticals, the company is offering you a retention bonus. Employee is being offered a Retention Bonus in order to encourage Employee to remain employed with the Company through February1, 2022. To retain employees, many companies offer incentives.