Building an AI Receptionist: Integration Challenges & Solutions

We’re building an AI Receptionist for a real estate client using Lindy.ai as the main engine. The agent needs to answer calls, introduce the business, handle common questions, check/confirm appointment availability (live via GoHighLevel), book appointments, and escalate complex queries to a human. Our planned stack: Lindy.ai for calls, ElevenLabs for voice, GPT-4o for conversation, n8n for automations (like calendar/API logic), and GHL for booking. The main thing we’re stuck on: How can we connect Lindy to n8n (or any external API) during a live call so we can check availability, book appointments, and trigger escalations with two-way data passing? Also, any best practices for handling TTS (with emotion) or escalations smoothly inside Lindy would help. If you have example setups, docs, or tips, would really appreciate it! Thanks 🙏