Broadcast Message Board Needs Template

Instead of having ONLY a free text to compose a message each time I want the option for our office to create and save a scripted message to click and use when the situation applies and then just fill in the [] with the specific date.

See example...

Hello, this is the Medical Clinic contacting you to inform you that our office will be closed on [DATE] due to inclement weather. Please call us at 123-456-7890 to reschedule your appointment. Thank you.