New appointment element

I am a photographer and need to basically set up mini session slots. I am doing pictures every 20 minutes on certain days. If I make a form with the new "appointment" element and a client selects a date and time slot out of the choices, will that date and time not be available for other people to choose? I have never used this element before and don't want to "double book" myself if that makes sense. I have included a link to my form that's in progress so you can check and make sure I did it correctly. Thanks!

I inspected your form and the appointment field is set properly. If a client selects a date and time slot, that date and time slot will not be available for other users. 

You can clone and test your form after you finish it just to be sure that it is working correctly. You can also test my cloned form - https://form.jotform.com/201620759389968 

great thank you so much!!