Use Case

AI Voice Agent for Lead Qualification & Booking

Built a 24/7 AI voice agent that qualifies leads, books appointments, answers customer questions, and syncs every interaction to CRM in real time.

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Case Study
AI Voice Agent
Industry
AI
Platform
Vapi
Type
AI Agent

Business Outcomes

Eliminated need for dedicated SDR or receptionist for routine call handling

Accelerated lead response to under 60 seconds regardless of time zone

Enabled 24/7 call and WhatsApp coverage without added staff

Automated appointment booking directly into the calendar during calls

Centralized call activity and lead status into a single team dashboard

Client Intro

Challenges

๐—ฆ๐—น๐—ผ๐˜„ ๐—น๐—ฒ๐—ฎ๐—ฑ ๐—ฟ๐—ฒ๐˜€๐—ฝ๐—ผ๐—ป๐˜€๐—ฒ: Leads calling or messaging outside business hours had no way to be engaged immediately, risking lost opportunities.

๐—œ๐—ป๐—ฐ๐—ผ๐—ป๐˜€๐—ถ๐˜€๐˜๐—ฒ๐—ป๐˜ ๐—พ๐˜‚๐—ฎ๐—น๐—ถ๐—ณ๐—ถ๐—ฐ๐—ฎ๐˜๐—ถ๐—ผ๐—ป: Manually screening callers for fit and intent varied by staff member and time of day, with no standardized scoring process.

๐— ๐—ฎ๐—ป๐˜‚๐—ฎ๐—น ๐—ฎ๐—ฝ๐—ฝ๐—ผ๐—ถ๐—ป๐˜๐—บ๐—ฒ๐—ป๐˜ ๐˜€๐—ฐ๐—ต๐—ฒ๐—ฑ๐˜‚๐—น๐—ถ๐—ป๐—ด: Booking meetings required a human to check availability and coordinate directly with the caller in real time.

๐—ฅ๐—ฒ๐—ฝ๐—ฒ๐˜๐—ถ๐˜๐—ถ๐˜ƒ๐—ฒ ๐˜€๐˜‚๐—ฝ๐—ฝ๐—ผ๐—ฟ๐˜ ๐—ถ๐—ป๐—พ๐˜‚๐—ถ๐—ฟ๐—ถ๐—ฒ๐˜€: Common customer questions consumed staff time that could otherwise go toward higher-value work.

๐——๐—ถ๐˜€๐—ฐ๐—ผ๐—ป๐—ป๐—ฒ๐—ฐ๐˜๐—ฒ๐—ฑ ๐—ฐ๐—ฎ๐—น๐—น ๐—ฟ๐—ฒ๐—ฐ๐—ผ๐—ฟ๐—ฑ๐˜€: Conversation outcomes and lead status lived in call logs disconnected from the CRM, requiring manual updates.

๐—ก๐—ผ ๐˜‚๐—ป๐—ถ๐—ณ๐—ถ๐—ฒ๐—ฑ ๐˜ƒ๐—ถ๐˜€๐—ถ๐—ฏ๐—ถ๐—น๐—ถ๐˜๐˜†: Teams lacked a single place to see call activity, lead status, and follow-up needs across both voice and WhatsApp channels.

Solution

The agent was built around real-time voice and messaging infrastructure, with AI driving the actual conversation, qualification judgment, and routing decisions throughout each interaction.

๐—–๐—ฎ๐—น๐—น ๐—ฎ๐—ป๐—ฑ ๐—บ๐—ฒ๐˜€๐˜€๐—ฎ๐—ด๐—ฒ ๐—ถ๐—ป๐˜๐—ฎ๐—ธ๐—ฒ (๐—ณ๐—ถ๐˜…๐—ฒ๐—ฑ ๐—ถ๐—ป๐—ณ๐—ฟ๐—ฎ๐˜€๐˜๐—ฟ๐˜‚๐—ฐ๐˜๐˜‚๐—ฟ๐—ฒ): Twilio provisions a dedicated US phone number for inbound and outbound calls, paired with WhatsApp API integration for messaging-based interactions.

๐—ฅ๐—ฒ๐—ฎ๐—น-๐˜๐—ถ๐—บ๐—ฒ ๐—ฐ๐—ผ๐—ป๐˜ƒ๐—ฒ๐—ฟ๐˜€๐—ฎ๐˜๐—ถ๐—ผ๐—ป๐—ฎ๐—น ๐—”๐—œ (๐—”๐—œ-๐—ฑ๐—ฟ๐—ถ๐˜ƒ๐—ฒ๐—ป ๐—ท๐˜‚๐—ฑ๐—ด๐—บ๐—ฒ๐—ป๐˜): VAPI and OpenAI power natural, context-aware conversation for every call, allowing the agent to understand caller intent and respond dynamically rather than following a rigid script.

๐—Ÿ๐—ฒ๐—ฎ๐—ฑ ๐—พ๐˜‚๐—ฎ๐—น๐—ถ๐—ณ๐—ถ๐—ฐ๐—ฎ๐˜๐—ถ๐—ผ๐—ป (๐—”๐—œ-๐—ฑ๐—ฟ๐—ถ๐˜ƒ๐—ฒ๐—ป ๐—ท๐˜‚๐—ฑ๐—ด๐—บ๐—ฒ๐—ป๐˜): During the call, the agent asks screening questions and scores the caller's responses to determine lead quality, a genuine judgment call rather than a fixed checklist.

๐—ฅ๐—ผ๐˜‚๐˜๐—ถ๐—ป๐—ด ๐—ฑ๐—ฒ๐—ฐ๐—ถ๐˜€๐—ถ๐—ผ๐—ป (๐—”๐—œ-๐—ฑ๐—ฟ๐—ถ๐˜ƒ๐—ฒ๐—ป ๐—ท๐˜‚๐—ฑ๐—ด๐—บ๐—ฒ๐—ป๐˜): Based on the qualification score, the agent routes hot leads differently from lower-priority ones, directing the conversation or follow-up accordingly.

๐—”๐—ฝ๐—ฝ๐—ผ๐—ถ๐—ป๐˜๐—บ๐—ฒ๐—ป๐˜ ๐—ฏ๐—ผ๐—ผ๐—ธ๐—ถ๐—ป๐—ด (๐—”๐—œ-๐—ฑ๐—ฟ๐—ถ๐˜ƒ๐—ฒ๐—ป ๐—ฎ๐—ฐ๐˜๐—ถ๐—ผ๐—ป): When appropriate, the agent books a meeting directly into the calendar during the live call, without requiring a human to confirm availability afterward.

๐—–๐˜‚๐˜€๐˜๐—ผ๐—บ๐—ฒ๐—ฟ ๐˜€๐˜‚๐—ฝ๐—ฝ๐—ผ๐—ฟ๐˜ ๐—ต๐—ฎ๐—ป๐—ฑ๐—น๐—ถ๐—ป๐—ด (๐—”๐—œ-๐—ฑ๐—ฟ๐—ถ๐˜ƒ๐—ฒ๐—ป ๐—ท๐˜‚๐—ฑ๐—ด๐—บ๐—ฒ๐—ป๐˜): The agent resolves common inquiries conversationally and identifies when a request requires escalation to a human.

๐—ฅ๐—ฒ๐—ฐ๐—ฒ๐—ฝ๐˜๐—ถ๐—ผ๐—ป๐—ถ๐˜€๐˜ ๐—ฑ๐˜‚๐˜๐—ถ๐—ฒ๐˜€ (๐—”๐—œ-๐—ฑ๐—ฟ๐—ถ๐˜ƒ๐—ฒ๐—ป ๐—ท๐˜‚๐—ฑ๐—ด๐—บ๐—ฒ๐—ป๐˜): For general callers, the agent greets, collects relevant information, and determines the appropriate person or department to route the caller to.

๐—ช๐—ผ๐—ฟ๐—ธ๐—ณ๐—น๐—ผ๐˜„ ๐—ผ๐—ฟ๐—ฐ๐—ต๐—ฒ๐˜€๐˜๐—ฟ๐—ฎ๐˜๐—ถ๐—ผ๐—ป (๐—ณ๐—ถ๐˜…๐—ฒ๐—ฑ ๐—น๐—ผ๐—ด๐—ถ๐—ฐ): N8N coordinates the backend logic connecting call events, qualification outcomes, and appointment actions to downstream systems.

๐—–๐—ฅ๐—  ๐˜€๐˜†๐—ป๐—ฐ ๐—ฎ๐—ป๐—ฑ ๐—ฑ๐—ฎ๐˜€๐—ต๐—ฏ๐—ผ๐—ฎ๐—ฟ๐—ฑ ๐—น๐—ผ๐—ด๐—ด๐—ถ๐—ป๐—ด (๐—ณ๐—ถ๐˜…๐—ฒ๐—ฑ ๐—น๐—ผ๐—ด๐—ถ๐—ฐ): Every call's conversation data, lead status, and outcome are automatically synced to a Retool dashboard for centralized team visibility.

Technology Stack

Voice infrastructure: Twilio for phone number provisioning and call handling

Conversational AI: VAPI for real-time voice agent orchestration

AI/LLM: OpenAI for natural language conversation, qualification, and decision-making

Messaging: WhatsApp API for message-based interactions

Orchestration: n8n workflow automation for backend logic and integrations

Dashboard and CRM: Retool for centralized call activity, lead status, and follow-up management

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