How can I limit the number of available spots in my registration form?

We have a booking form already for our dog training classes. 

I wish to put in a button for course registration and also wish to limit the number of people who can be in each class. Meaning, there will be a set number of accepted participants to each class and I'd like it to be visible to the people who are registering themselves online, so they put themselves into the appropriate class. 

Do you have a function in jot-form that would help me do that? 

Attached below is the form we had made for us. 

Hi @fariholl!

Looks like your previous question has already been answered by my colleague in this thread: https://www.jotform.com/answers/1925510. I can only add that we also have a widget called Appointment Slots which might fit your requirements: Appointment_slots.