# Predict no-show risk and route reminders with Google Calendar: n8n workflow

> Started by a clock, and works across Gmail, Google Calendar, Google Sheets and Slack. It hands the judgement calls to OpenAI.

Source: https://millionrounds.com/workflow/predict-no-show-risk-and-route-reminders-with-google-calenda (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Scheduling](https://millionrounds.com/workflows?category=Scheduling#library)

# Predict no-show risk and route reminders with Google Calendar

Started by a clock, and works across Gmail, Google Calendar, Google Sheets and Slack. It hands the judgement calls to OpenAI. 13 steps, 1 branch: a working afternoon to understand properly.

Medium Calls a model: OpenAI

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fpredict-no-show-risk-and-route-reminders-with-google-calenda)

**13 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**0** Loops or waits

**4** Services it connects to

## The flow

Starts it 1 Model 2 Logic 4 Service 6

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

- 1 **Daily at 9 AM** Schedule trigger *Starts it*
- 2 **Set Configuration** Set *Logic*
- 3 **Get Tomorrow's Bookings** Google Calendar *Service*
- 4 **Extract Customer Info** Set *Logic*
- 5 **Lookup Customer History** Google Sheets *Service*
- 6 **Calculate Risk Score** Code *Logic*
- 7 **Route by Risk Level** Switch *Logic*
- 8 **Generate Urgent Message** Open Ai *Model*
- 9 **Generate Reminder** Open Ai *Model*
- 10 **Log Low-Risk Booking** Google Sheets *Service*
- 11 **Send Slack Alert** Slack *Service*
- 12 **Send Re-confirmation Email** Gmail *Service*
- 13 **Send Reminder Email** Gmail *Service*

## How it's built

- **Starts on:** A clock
- **Steps:** 13, with 1 branch
- **Size:** Medium: a working afternoon
- **Connects to:** Gmail, Google Calendar, Google Sheets, Slack
- **Model:** OpenAI

## Questions

What does it need to run?

An n8n account, plus your own Gmail, Google Calendar, Google Sheets and Slack accounts, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on a clock.

Does it use AI?

Yes. It calls OpenAI. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 13 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 13 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fpredict-no-show-risk-and-route-reminders-with-google-calenda)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Gmail](https://millionrounds.com/workflows?service=Gmail#library)[Google Calendar](https://millionrounds.com/workflows?service=Google+Calendar#library)[Google Sheets](https://millionrounds.com/workflows?service=Google+Sheets#library)[Slack](https://millionrounds.com/workflows?service=Slack#library)

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Also scheduling, with the same services where possible, closest in size first.

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