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Voice agent for dental appointment booking with Gemini AI

Lucas WalterLucas Walter
16522 views
2/3/2026
TransformationString ManipulationJSONData ProcessingUtility
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This workflow contains community nodes that are only compatible with the self-hosted version of n8n.

AI dental appointment booking with Google Calendar and Sheets

Who's it for

This workflow is perfect for dental practices, medical offices, and healthcare providers who want to automate their appointment scheduling process. It's ideal for practices that receive high volumes of appointment requests and want to reduce manual booking while maintaining accurate patient records.

What it does

This AI-powered voice agent handles complete appointment booking workflows for "Pearly Whites Dental." When patients call or submit requests, the system:

  • Analyzes the request using Google Gemini AI to understand patient needs
  • Checks calendar availability in real-time via Google Calendar integration
  • Automatically finds and offers up to 2 available appointment slots when the preferred time isn't available
  • Books confirmed appointments directly to the practice calendar
  • Logs all patient information (name, insurance, concerns) to Google Sheets for record-keeping
  • Maintains conversation context across interactions for natural dialogue flow

The workflow operates in Central Time Zone and assumes standard business hours (8 AM - 5 PM, excluding lunch).

How it works

The system receives webhook requests containing patient interaction data. The AI agent processes this information and determines which tools to use based on the request type. For availability checks, it intelligently searches multiple time slots in 30-minute increments until finding suitable options. All appointments are automatically formatted as "Dental Appointment | [Patient Name]" and logged with complete patient details.

Requirements

  • Google Calendar API access with OAuth2 credentials
  • Google Sheets API access for patient data logging
  • Google Gemini API key for AI processing
  • Webhook endpoint for receiving requests
  • Pre-configured Google Calendar and Sheets document

How to set up

  1. Configure Google Calendar credentials in the calendar tool nodes
  2. Set up Google Sheets integration with your patient tracking spreadsheet
  3. Add your Google Gemini API key to the language model node
  4. Update the calendar ID in both calendar nodes to match your practice calendar
  5. Modify the Google Sheets document ID to point to your patient records sheet
  6. Test the webhook endpoint to ensure proper request processing

How to customize the workflow

  • Adjust business hours by modifying the availability checking logic in the system prompt
  • Change appointment duration by updating the end time calculation (currently set to 1 hour)
  • Modify patient data fields by updating the Google Sheets column mapping
  • Update practice name by changing "Pearly Whites Dental" references in the system prompt
  • Customize response format by adjusting the AI agent's instructions for different appointment types

Voice Agent for Dental Appointment Booking with Gemini AI

This n8n workflow demonstrates how to build a conversational AI agent using Google Gemini and Langchain for potential use in automating dental appointment booking or similar voice-driven interactions. It leverages a webhook to receive input, processes it with an AI agent, and provides a response.

What it does

This workflow sets up a basic AI-powered conversational agent:

  1. Listens for incoming requests: A Webhook node acts as the entry point for the conversation, receiving user input.
  2. Manages conversation history: A Simple Memory node (Memory Buffer Window) maintains the context of the conversation, allowing the AI to remember previous turns.
  3. Processes input with an AI Agent: The AI Agent node (Langchain Agent) serves as the core of the conversational logic. It uses a Google Gemini Chat Model as its underlying language model.
  4. Enables internal thought processes: A Think tool is included, allowing the AI agent to perform internal reasoning or planning before generating a response.
  5. Responds to the caller: The Respond to Webhook node sends the AI agent's generated response back to the system that initiated the webhook call.

Prerequisites/Requirements

To use this workflow, you will need:

  • n8n instance: A running n8n instance.
  • Google Gemini API Key: Access to the Google Gemini API is required for the Google Gemini Chat Model node. You will need to configure credentials for this.
  • Langchain Nodes: Ensure the @n8n/n8n-nodes-langchain package is installed and enabled in your n8n instance.

Setup/Usage

  1. Import the workflow: Download the provided JSON and import it into your n8n instance.
  2. Configure Credentials:
    • Open the Google Gemini Chat Model node.
    • Select or create a new credential for Google Gemini. You will need to provide your API Key.
  3. Activate the Webhook:
    • The Webhook node will generate a unique URL when the workflow is activated. This URL will be the endpoint for your voice agent.
    • You can test this by sending a POST request to the webhook URL with a JSON body containing your conversational input.
  4. Activate the workflow: Once configured, activate the workflow to make it live and ready to receive requests.

This workflow provides a foundational structure for building more complex voice agents. You can expand upon it by adding more tools to the AI Agent (e.g., tools for looking up dental appointment availability, booking appointments, sending confirmations, etc.) and integrating with other services.

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