@amir
Currently, VAPI does not have a built-in feature to set a delay after the end call message before the call is terminated. However, you can implement a workaround by adding a brief pause in your end call message. For example, you could include a phrase like "Thank you for using our service. We will now end the call. Have a great day... Goodbye." The ellipsis (...) represents a brief pause, giving the impression of a delay.
As for prompting the customer to acknowledge after the wrap-up phrase, you could say something like, "Is there anything else I can assist you with before we end the call?" This invites the customer to speak if they need further assistance and provides a natural pause before concluding the call.
If you need to implement a specific delay feature or have further questions, please ask support for more info on this.