I want to creat a form where people can stop at any point and come back to it at later time to complete it. Is that possible here?

Yes this is possible to do in JotForm. You just need to enable the Autofill option on your form.

Check our user guide about it here : https://www.jotform.com/help/227-How-to-Enable-Auto-Fill-on-Forms

Let us know if you need further assistance.