Waitlist and Full-Class Messages

A full class is good news that feels bad. The member wants to come, and you have to say no for now. The message should say no kindly, then give them something to do next.

There are three messages here. Each one is short.

When the class is full

Say it's full, say what they can do, and stop.

• Tell them the class is full
• Offer the waitlist, if you have one
• Name another class that's open, if there is one
• Say how to book next time

Write a short, friendly message telling a member that [class name] on [day] is full. Offer the waitlist and mention [alternative class]. Use only these facts. No promises that a spot will open.

That last line matters. Don't let a draft say "we'll get you in". You can't know that.

When they join the waitlist

Spell out how your waitlist works, because members guess when you don't. A person who thinks they're first in line and isn't will be upset later.

Your message should say:

• Whether spots are offered in order of joining
• How members will be told when one opens
• How long they have to say yes
• That joining the list isn't a booking

If you don't yet know some of these answers, settle them before you ask any tool to write the message. A tool will fill a gap with something that sounds sensible. The OAIC warns that AI results can be false.¹

Here's a prompt:

Write two sentences telling a member they're on the waitlist for [class name] on [day]. Include these points only: spots go in order of joining, we'll message if one opens, there's [time limit] to confirm, and the list isn't a booking.

When a spot opens

This one is urgent, so make it quick to read. Put the action first.

"A spot has opened in [class name] on [day] at [time]. Reply YES by [deadline] to take it. If we don't hear from you, we'll offer it to the next person."

Then, if they say yes, send a normal confirmation. If they miss the deadline, send a gentle note that the spot has gone to the next person and they're still on the list for future ones, if that's true.

Don't invent urgency that doesn't exist. If the spot is open until the class starts, say so.

Waitlist messages and marketing rules

A waitlist notice tells someone about a booking they asked for. It isn't an advertisement. Keep it that way. Don't add "while you're here, try our new membership deal".

If you do want to promote something, that's a separate message. Australia's ACMA wants consent first and an opt-out in every marketing message.² That's Australian guidance only. Your own regulator will say what applies in your country.

Don't paste the waitlist itself

It's tempting to paste the whole waitlist and ask the tool to write all the messages at once. Don't. A waitlist is a list of names and contact details.

The OAIC advises against typing personal information into public AI chatbots.¹ Use the tool for the template, not the list.

Write the template with blanks. Fill the blanks in your booking system, or by hand.

Check the live facts

A chatbot's training stops at a cut-off date, but it can search the web for newer facts.³ Either way, it has no access to your timetable or bookings. Give it every live fact each time, such as which classes are full or that you moved Thursday's session, and read the result before it goes out.