Kindly help with the following e-mail?

As i have conducted 3-4 follow up meeting for policy implementation of data( hard filling and etc.) and the final meeting has been conducted yesterday , i will need to send some key points for the final meeting , as all colleagues work hard and helping with their part of the process , i want to write at the end of the e-mail the following

"As this was the final follow up / rerview meeting , sincere appreciation of your hard work for this exercise, however we remain available for any further assistance on X policy"

Could you advise how i can describe the last sentence in a more formal way and without any mistakes

the main point is to tell that as this last the last meeting , we will remain available for any further assistance /help needed , and to thank them for the help and for their continuous work

Thank you.