How can I make an option disappear after it has been selected?

We are doing a photography event with only one sign up per time slot (per photographer).  I need the time slot to disappear from the list once a sign up has occurred.  How do I make this happen?

Thank you!

Hi,

You may want to take a look at Appointment Slots widget also.

link: http://widgets.jotform.com/widget/appointment_slots

You can setup like this

Here is my demo form you can test https://form.jotform.com/52876293356972?

Let us know how we can be of further assistance.