Is it possible to have my vapi assistant schedule an appointment OTP and book it straight into gohighlevel calendar?

Connect GoHighLevel and default tools (sms, dtmf, apiRequest) in vapi, then configure your assistant’s system prompt to send an OTP via SMS, capture it via DTMF, validate it through your API, and if valid, use GoHighLevel tools to check availability and book the appointment.. https://docs.vapi.ai/tools/go-high-level https://docs.vapi.ai/tools/default-tools

Assistant What day would you like to book the meeting? You We do August seventh? Assistant And what time on that day works best for you? You Does 1 PM work? Get Duplicate Contact Completed successfully 11:06 PM Assistant It looks like we don't have any available times on August seventh at 1 PM. Would you like to select a different day or time? it keeps giving me this same message even tho there are available times on that day and time please help my calendar id is correct

Your assistant says no slots are available because the ghl_check_availability tool likely has a timezone mismatch, a too-narrow time window, or calendar settings like buffers or limits blocking the 1 PM slot so ensure your checkAvailability tool uses the correct calendarId, time zone, and a full-day timestamp range to capture 1 PM accurately..