It would be helpful for users to be able to specify a custom message that the bot can post if it does not know the answer to a question.

To make this custom message actionable, we can allow users to give a markdown message so that they can also redirect to urls, if need be.

An alternative can be that we can design a CTA type message with a button and the user can give the details for the message and the CTA button.

While markdown is more flexible, CTA button approach may look nicer. Let us know your thoughts below!