Hi @jmdunklinr5,- thank you for your question! Here is a quick workaround that you can use. You can create a custom "Ticket Status as Resolved- No response from requestor." Then you can create a shortcut within the ticket with two actions.
1. First action is "Set Status" to the custom status created
2. Second action is "Add Comment" and type out the comment you want the requestor to see. e.g "We closed the ticket because you didn’t provide the requested information."

Here are the guides regarding Custom Ticket Statuses and Shortcuts.

Found a great discussion article about using Stale Rule for altering users when ticket status is "waiting on requestor." https://community.incidentiq.com/discussions-tips-and-tricks-70/create-a-rule-for-stale-tickets-to-automatically-notify-the-requestor-and-close-the-ticket-372