It is a little difficult to answer this question accurately, because you have not provided enough information abou tthe type of meeting, the participants the size of the audience or the setting.
Generally speaking, you may end a meeting by stating,
"I have reached the end of my remarks, and unless there are any questions, I'd like to invite you all to enjoy refreshments. Please join us if you like."
"We are adjurned. Thank you for your attention."
"I am confident that I can count on your feedback in the near future. Your input is always appreciated. Thank you very much"
- For Teachers