Hi, Anne!

Thank you for choosing Amelia.

I'm afraid, with the current built-in features it's not possible to set any kind of limitations.

If you explain your requirements in a few words, probably I will be able to recommend a workaround, because sometimes there are no direct ways but still we can make it work.

Also, you can suggest "limited bookings" as a feature request here, or check if this request was already submitted and vote for it. 

Best Regards.