Automation library · Scheduling

Backfill cancelled appointments from a waitlist

Started by a clock, and works across Google Calendar, Google Sheets and WhatsApp. 12 steps, 1 branch: a working afternoon to understand properly.

Medium

12 stepsMedium: a working afternoon
1Branch: places the flow splits
0Loops or waits
3Services it connects to

The flow

Starts it 1Logic 6Service 5

The steps in the order they run, from what starts it.

  1. 1Every 15 minutesSchedule triggerStarts it
  2. 2SettingsSetLogic
  3. 3Get appointments in the booking windowGoogle CalendarService
  4. 4Read the bookings sheetGoogle SheetsService
  5. 5Read the waitlist sheetGoogle SheetsService
  6. 6Find freed appointment slotsCodeLogic
  7. 7Match waitlist people to freed slotsCodeLogic
  8. 8One item per offerSplit OutLogic
  9. 9Is sending switched on?IfLogic
  10. 10Offer the slot on WhatsAppWhats AppService
  11. 11Dry run, nothing is sentNo OpLogic
  12. 12Write the offer to the logGoogle SheetsService

How it's built

Starts on
A clock
Steps
12, with 1 branch
Size
Medium: a working afternoon
Connects to
Google Calendar, Google Sheets, WhatsApp
Model
None. This is plumbing, not judgement

Questions

What does it need to run?

An n8n account, plus your own Google Calendar, Google Sheets and WhatsApp accounts. You connect your own accounts after importing it; none are included.

What starts it?

It starts on a clock.

Does it use AI?

No. Every step is fixed logic or a call to a service, so it does the same thing every time.

How long does it take to set up?

Plan an afternoon. 12 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

Before you run it

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 12 steps before you point it at anything that matters.