# Book and remind appointments with Telegram and Gemini: n8n workflow

> Started by an incoming Telegram message, and works across Google Calendar, Google Sheets and Telegram. It hands the judgement calls to Gemini.

Source: https://millionrounds.com/workflow/book-and-remind-appointments-with-telegram-and-gemini (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)

# Book and remind appointments with Telegram and Gemini

Started by an incoming Telegram message, and works across Google Calendar, Google Sheets and Telegram. It hands the judgement calls to Gemini. 21 steps, 2 branches: large, and worth reading before you trust it with anything live.

Large Calls a model: Gemini

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fbook-and-remind-appointments-with-telegram-and-gemini)

**21 steps** Large: read it before trusting it with anything live

**2** Branches: places the flow splits

**0** Loops or waits

**3** Services it connects to

## The flow

Starts it 2 Model 2 Logic 8 Service 9

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

- 1 **When Telegram Message Received** Telegram trigger *Starts it*
- 2 **Every 15 Minutes** Schedule trigger *Starts it*
- 3 **Google Gemini Model** Lm Chat Google Gemini *Model*
- 4 **Parse Telegram Message** Code *Logic*
- 5 **Fetch Upcoming Events** Google Calendar *Service*
- 6 **Appointment Booking Agent** Agent *Model*
- 7 **Filter Due Reminders** Code *Logic*
- 8 **Validate Appointment Input** Code *Logic*
- 9 **Read Reminder Log in Sheets** Google Sheets *Service*
- 10 **If Needs Clarification** If *Logic*
- 11 **Assess Reminder State** Code *Logic*
- 12 **Send Clarification Request** Telegram *Service*
- 13 **Create Appointment Event** Google Calendar *Service*
- 14 **If Reminder Not Sent** If *Logic*
- 15 **Format Appointment Record** Code *Logic*
- 16 **Build Reminder Message** Code *Logic*
- 17 **Append Appointment in Sheets** Google Sheets *Service*
- 18 **Read Owner from Sheets** Google Sheets *Service*
- 19 **Send Confirmation via Telegram** Telegram *Service*
- 20 **Send Reminder via Telegram** Telegram *Service*
- 21 **Append Log in Sheets** Google Sheets *Service*

## How it's built

- **Starts on:** An incoming Telegram message
- **Steps:** 21, with 2 branches
- **Size:** Large: read it before trusting it with anything live
- **Connects to:** Google Calendar, Google Sheets, Telegram
- **Model:** Gemini

## Questions

What does it need to run?

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

What starts it?

It starts on an incoming Telegram message.

Does it use AI?

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

How long does it take to set up?

Take your time. At 21 steps it is large: read it before trusting it with anything live.

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 21 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%2Fbook-and-remind-appointments-with-telegram-and-gemini)
- **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.

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

## Workflows like it

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

- [**AI Virtual Assisstant Version 1 with Gemini and Gmail** 21 steps · calls a model · Gmail, Google Calendar](https://millionrounds.com/workflow/ai-virtual-assisstant-version-1-with-gemini-and-gmail)
- [**AI multi-agent executive team for entrepreneurs with Gemini** 21 steps · calls a model · Gmail, Google Calendar](https://millionrounds.com/workflow/ai-multi-agent-executive-team-for-entrepreneurs-with-gemini)
- [**Automate peer review assignments with Sonar Pro AI** 21 steps · calls a model · Discord, Email](https://millionrounds.com/workflow/automate-peer-review-assignments-with-sonar-pro-ai)
- [**Generate and schedule LinkedIn posts with Google Sheets** 21 steps · calls a model · Google Sheets, LinkedIn](https://millionrounds.com/workflow/generate-and-schedule-linkedin-posts-with-google-sheets)
- [**Manage restaurant reservations via WhatsApp with Gemini** 21 steps · calls a model · Google Calendar, Google Sheets](https://millionrounds.com/workflow/gestiona-reservas-de-restaurante-por-whatsapp-con-gemini-y)
- [**Personal Google Calendar & reminder bot on Telegram** 21 steps · calls a model · Google Calendar, Telegram](https://millionrounds.com/workflow/personal-google-calendar-and-reminder-bot-on-telegram)