You can call it what ever you like, but to me this is deceptive.
Where is the difference between this and Indian support staff pretending to be in your vicinity by telling you about the local weather? Your version is arguably even worse because it can plausibly fool people more competently.
It doesn't have to be. You can configure your bot to great the user.
E.g. "Aleksandra is not available at the moment, but I'm her AI assistant to help you book a table. How may I help you?"
So you're telling the caller that it is an AI, and yet you can have a pleasant background audio experience.
Where is the difference between this and Indian support staff pretending to be in your vicinity by telling you about the local weather? Your version is arguably even worse because it can plausibly fool people more competently.