An inbound call at 7am or on a Saturday does not have to go to voicemail. Voice AI answers in your voice, qualifies the caller, and can book them into your calendar — all without your involvement. For service businesses with consistent inbound call volume, this is one of the highest-leverage AI features available.

Voice AI in MONDAi runs on GoHighLevel's AI telephony infrastructure and integrates directly with your connected phone number, calendar, and CRM.

Steps

Navigate to Voice AI settings

Go to Settings → Voice AI. You will see your connected phone numbers. Toggle Voice AI on for the number you want it to answer. Voice AI and missed call text back can run together — Voice AI answers first, missed call text back fires only if Voice AI cannot handle the call.

Choose your AI voice

Select from the available voice options. Choose one that matches your brand tone. There is no objectively correct choice — pick what sounds most consistent with how you or your team communicates.

Write your greeting and script

Set the opening greeting and the qualification questions. See the Script Writing section below for guidance on what works. The script is the most important part of Voice AI setup — more important than any technical configuration.

Configure booking integration

Connect Voice AI to your discovery call or intake calendar. When a caller qualifies, the AI can offer available slots and book the appointment in real time. The caller receives a confirmation SMS immediately after booking.

Set transfer and escalation rules

Define when Voice AI should transfer to a live person: if the caller says they are an existing client, if they are upset, or if they ask to speak with someone. Transfer routes to your forwarding number or puts the call in a queue.

Test with a real call

Call your own number from a mobile phone and walk through the entire flow as if you were a new prospect. Check that the greeting sounds natural, the qualification questions feel relevant, the booking flow works correctly, and the confirmation SMS arrives. Do not go live without completing this step.

Writing Your Call Script

The quality of Voice AI responses depends almost entirely on how well you write the script. Three principles:

Short sentences only. AI voice synthesis handles short, direct sentences better than long, compound ones. Write how you would actually speak on a call — not how you would write an email.

One question at a time. Do not ask two things in one turn. "What brings you to us today, and have you worked with a coach before?" produces confusion. Ask one question, let the caller answer, then move to the next.

Define a clear outcome for each call type. What should happen when someone calls who is a perfect fit? What happens if they're not? Map both paths before writing the script.

Common Mistakes

A greeting that sounds robotic. Write the greeting exactly as you would say it if you answered personally. "Hi, this is [Name] from [Brand]" outperforms "Thank you for calling [Brand], how may I direct your call?" every time.
No transfer rule. Without an escalation path, Voice AI will try to handle every call — including ones that genuinely need a human. Always define at least one transfer trigger.
Not testing the booking flow end-to-end. The greeting and questions are easy to test. The booking flow — the offer of available times, the confirmation — requires a full test call with a real calendar booking. Do not skip this.
Going live on your main number before testing on a secondary one. If possible, configure Voice AI on a test number first, validate the full experience, and then move it to your primary business number.

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