Is there a way to have multiple people fill out the same form


So I have a form that is filled out partially by the user initiating the form. An alert is sent to the person in the 'Assigned To' field. Let's say the ID on the form is #4.

I would like for the assignee to be able to open the form and fill out their portion of it. They will not fill out their portion of the form at the same time they receive notification. They should be able to come back to form ID #4 at any time and update information in it.

Basically I am asking is there a way to save information in the form then submit the form when ready. All the information for form with ID #4 goes on the same row in the associated smartsheet.

I hope this makes sense!