Retell Incoming Call Dynamic Variable Filling Workflow
This workflow is designed to achieve personalized voice interaction by receiving incoming call requests and extracting the caller's number, automatically retrieving user information from Google Sheets. This process ensures security and dynamically populates user data into the voice conversation, enhancing intelligence and user experience. It effectively addresses the cumbersome issues of manual maintenance and hard-coded variables, making it suitable for scenarios such as voice customer service and intelligent assistants.
Workflow Name
Retell Incoming Call Dynamic Variable Filling Workflow
Key Features and Highlights
This workflow processes incoming call Webhook requests from the Retell platform, retrieves corresponding user information from a Google Sheets user database based on the caller’s phone number, and dynamically fills these details into Retell voice agent variables to enable personalized voice interactions. It supports IP whitelist restrictions to ensure security and offers flexible integration with Google Sheets for easy management and expansion of user data.
Core Problem Addressed
It solves the challenge of how a voice agent can quickly and accurately obtain personalized user information during incoming calls and dynamically inject it into conversations. This enhances the intelligence and user experience of voice interactions while eliminating the need for manual maintenance and hard-coded variables.
Application Scenarios
- Automated identification of incoming callers in voice customer service systems with personalized greetings
- Intelligent voice assistants dynamically adjusting dialogue content based on user information
- Any voice interaction scenario developed on the Retell platform requiring personalized service by matching user data via phone numbers
Main Workflow Steps
- The Retell platform triggers an incoming call Webhook (POST request), restricting request source IPs to a specified whitelist
- The workflow receives the Webhook and extracts the caller’s phone number
- Using the phone number as a key, it queries matching user records in Google Sheets
- Formats the retrieved user dynamic variables (e.g., name, email, custom fields) into the JSON response format expected by Retell
- Returns the data to Retell to enable dynamic variable replacement and personalized dialogue
Involved Systems or Services
- Retell Voice Agent Platform (Inbound Call Webhook feature)
- Google Sheets (used as the user information database)
- n8n Automation Platform (for orchestration and process handling)
Target Users and Value
- Voice agent developers and operators, especially teams building intelligent voice applications on the Retell platform
- Enterprises needing rapid deployment of incoming call identity recognition and dynamic dialogue variable replacement
- Organizations aiming to connect telephony systems with user databases via no-code/low-code solutions to improve customer service efficiency and experience
This workflow is streamlined and efficient, ideal for quick integration and scalable user data sources. It helps you create personalized, intelligent voice call experiences while reducing repetitive configuration and maintenance costs. Simply configure your Google Sheets and Retell accounts to get started effortlessly.