TRINH VAN PHUC

FenBig AI Receptionist is the AI voice agent that never misses a call for US local businesses. FenBig's SMS service predates the hackathon window. Everything shown in the demo video was built during the hackathon window (26 October – 4 November 2026): the entire voice call component, including Twilio voice webhooks, the conversation stage machine, the AI reply layer, structured tool calling, the four-tier Meta fallback chain, lead capture, and human handoff. For HVAC and other local service businesses, a missed call is a job lost to a competitor. FenBig answers instantly, walks through Issue, Address, Urgency, Preferred time and Confirm to Completed, books the appointment with a real tool call, saves the lead, and hands off to a human when asked.