Multilingual AI VoIP Agent Integration

I want to deploy an AI-driven voice agent on our 3CX phone system that can:
• answer incoming calls naturally in English and Nederlands;
• switch languages mid-conversation when needed, providing real-time language translation;
• book or reschedule appointments by talking directly to callers and writing the results into our Odoo CRM calendar (no separate calendar app—Odoo holds the single source of truth).

Key expectations
– Seamless SIP or WebRTC connection to 3CX, so every extension can route to the agent when human staff are busy.
– Accurate speech-to-text and text-to-speech with voices that sound professional in both supported languages.
– A dialogue flow that recognises common scheduling phrases, verifies caller details, and confirms the booking before ending the call.
– Automatic call notes pushed to the matching contact record inside Odoo, along with the new appointment entry.
– Clear hand-off rules: if confidence drops below an agreed threshold, the call must transfer to a live agent.

Deliverables
1. Configured AI call bot running in a cloud environment we control.
2. 3CX integration scripts or templates, fully documented.
3. Odoo CRM module or API script that creates and updates calendar events.
4. Written setup guide and brief video walk-through so our in-house admin can maintain it.
5. One round of post-deployment fine-tuning based on real call logs.

Experience with 3CX, Odoo, and conversational AI platforms such as Dialogflow, Voiceflow, or Rasa will be a big plus. Let me know which stack you prefer and how quickly you can deliver a functional prototype.