I am calling Vapi http endpoint to make an outbound call. I am passing certain variables to it under assistantOverrides.variableValues. I have setup a function call with parameter as "mrn". I am expecting that when Vapi calls my webhook endpoint, it passes "mrn" parameter with value as "MRN12345" but its passing "John Doe" in "mrn". What am i doing wrong? { "customer":{ "number":"+1xxxxxxxx" }, "assistantId":"xxxx", "phoneNumberId":"xxxx", "assistantOverrides":{ "variableValues":{ "current_date":"2025-05-16T10:14:23.644585", "provider_name":"Dr. John Smith", "department":"Cardiology", "available_date":"2025-05-09T09:14:23.644585", "patient_name":"John Doe", "mrn":"MRN12345", "call_session_id":"xxxx", "current_appointment_id":"xxxx", "available_appointment_id":"xxx" } } }

Make sure your assistant is set to use mrn and not patient_name.

Yes, i checked that. Even other parameter values are not being set correctly.

Check they exactly match what's used in your assistant's prompts, are saved properly in the dashboard, and that the assistant is actually referencing those variables like this {{mrn}} in its configuration.

these variables were not being referenced in my prompt. I added a hidden reference for them in my system prompt and now i see some of these parameters populating correctly. But for some of the parameters the values are getting mismatched across variables. For eg: i have current_appt_id, available_appt_id, session_id. I see the available_appt_id value being passed in both current_appt_id and available_appt_id.

The variable mismatch is likely due to incorrect or duplicate references in your prompt, review and fix each variable placeholder to ensure they map correctly.

@Aditya Checking if you are still blocked with this issue?