Setting limit in the number of submissions

How can I put a form limit on so that once a certain number of bookings have been received it stops allowing more bookings?

You can set a limit to the number of submissions so that you won't receive new submissions when the limit is reached. Please follow the steps below:

1. Click the "Preferences" button in the top toolbar.

2. Go to the "Form Limits" tab.

3. Double click the value of the "Submission Limit".

Guide: http://www.jotform.com/help/137-How-to-Limit-Submissions-in-a-Form

Hope this helps. Thank you