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AI-powered webinar feedback replies with GPT-4, Google Sheets, and Gmail

Avkash KakdiyaAvkash Kakdiya
87 views
2/3/2026
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How it works

This workflow captures webinar feedback through a webhook and normalizes the submitted data for processing. It stores raw feedback in Google Sheets, uses an AI model to understand sentiment and intent, and generates a personalized response. A professional HTML thank-you email is sent automatically to each attendee. All replies and delivery details are logged back into the spreadsheet for tracking.

Step-by-step

  • Receive webinar feedback

    • Feedback Webhook – Accepts feedback submissions from a webinar form in real time.
    • ID Generation – Creates a human-readable, unique feedback ID for tracking.
    • Normalize Feedback – Cleans and standardizes incoming fields like name, email, rating, and comments.
  • Store and enrich feedback

    • Store Partial – Saves the raw feedback data into Google Sheets.
    • Common Resources – Attaches shared webinar resources such as recordings and slides.
  • Analyze feedback with AI

    • Message a model – Evaluates sentiment, engagement level, and intent using an AI model.
    • Parse AI Response – Extracts structured insights like segment, reply text, and next steps.
  • Generate and send follow-up

    • Merge – Combines feedback data, AI response, and resources.
    • Build Email HTML – Creates a clean, professional HTML email tailored to each attendee.
    • Send AI Thank You Email – Sends the personalized follow-up via Gmail.
  • Log final outcome

    • Store Feedback – Updates Google Sheets with the sent email content, timestamp, and status.

Why use this?

  • Save time by automating webinar feedback follow-ups end to end.
  • Ensure every attendee receives a thoughtful, personalized response.
  • Maintain a complete feedback and communication log in one place.
  • Improve engagement without sounding promotional or generic.
  • Scale post-webinar communication without manual effort.

AI-Powered Webinar Feedback Replies with GPT-4, Google Sheets, and Gmail

This n8n workflow automates the process of generating personalized replies to webinar feedback, storing the original feedback and generated replies in Google Sheets, and then sending these replies via Gmail. It leverages the power of GPT-4 to create human-like responses, streamlining communication and ensuring timely follow-ups.

What it does

This workflow automates the following steps:

  1. Receives Webinar Feedback: It starts by listening for incoming webinar feedback via a webhook. This acts as the trigger for the entire automation.
  2. Generates AI Reply: The received feedback is then sent to OpenAI (GPT-4) to generate a personalized and appropriate reply.
  3. Stores Feedback and Reply: Both the original webinar feedback and the AI-generated reply are recorded in a Google Sheet for logging and tracking purposes.
  4. Sends Email Reply: Finally, the AI-generated reply is sent to the feedback provider via Gmail, ensuring prompt communication.

Prerequisites/Requirements

To use this workflow, you will need:

  • n8n Account: An active n8n instance (cloud or self-hosted).
  • OpenAI API Key: An API key for OpenAI, with access to GPT-4.
  • Google Sheets Account: A Google account with access to Google Sheets. You'll need to create a spreadsheet to store the feedback and replies.
  • Gmail Account: A Google account with access to Gmail for sending emails.

Setup/Usage

  1. Import the Workflow:
    • Download the provided JSON file for this workflow.
    • In your n8n instance, click on "Workflows" in the left sidebar.
    • Click "New" -> "Import from JSON" and paste the workflow JSON or upload the file.
  2. Configure Credentials:
    • OpenAI: Set up your OpenAI credential using your API key.
    • Google Sheets: Set up your Google Sheets credential. This typically involves OAuth authentication.
    • Gmail: Set up your Gmail credential, also usually via OAuth.
  3. Configure Nodes:
    • Webhook: Activate the Webhook node. Copy the webhook URL and configure your webinar feedback system to send data to this URL when new feedback is submitted.
    • Google Sheets:
      • Specify the Spreadsheet ID and Sheet Name where you want to store the feedback and replies.
      • Ensure the sheet has appropriate headers (e.g., "Feedback", "AI Reply", "Timestamp", "Email").
    • OpenAI:
      • Ensure the "Model" is set to a GPT-4 variant (e.g., gpt-4).
      • Review the prompt to ensure it generates the desired type of reply.
    • Gmail:
      • Configure the "To" email address using an expression to dynamically pull the email from the incoming webhook data (e.g., {{ $json.email }}).
      • Set the "Subject" and "Body" of the email to include the AI-generated reply and any other relevant information.
  4. Activate the Workflow: Once all credentials and nodes are configured, activate the workflow.

Now, whenever new webinar feedback is sent to the webhook, the workflow will automatically process it, generate a reply, log it, and send the email.

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