How can I include a reminder of appt

I have created the attached form and would like to be able to have the client recieve a text reminder of the scheduled appointment is there a way to accomplish this in Jot form?

I think you may set up an email auto-responder that can be send on a later date: https://www.jotform.com/help/26-Setting-up-an-Autoresponder-Email

If you need to send a text message to the submitter then you may use WebHooks, this guide will help you: https://www.jotform.com/help/245-How-to-Setup-a-Webhook-with-JotForm

Here's a guide with examples about how to use it: https://www.jotform.com/help/248-Webhook-PHP-Script-Examples 

I hope this helps.