AI Voice Appointment Scheduling Agent

I need an AI-powered voice agent that can pick up incoming calls, speak naturally with the caller, confirm a convenient time, and drop the final booking straight into our Google Calendar through its API... (Budget: ₹12500 - ₹37500 INR, Jobs: AI Chatbot Development, AI Development, AI Model Development, API Integration, Automation, Natural Language Processing, SIP, Twilio)