I'm guessing you're setting up an outbound caller. If so, its pretty simple if you send a webhook from ghl to make. Catch the webhook in make and in the next step send a http request to vapi to create that call with all the personalisation you want by specifiying assistnat override to add dynamic variables in your prompt. There are different ways you can do this. But this is my preferred way. You can send custom request from ghl itself, if you want.