Are AI-receptionists for clinics real?

Hello, my dad is a doctor and clinic owner and someone offered to build an AI-Calling agent (Receptionist). He said that the AI-agent can handle all incoming calls 24/7, answer the common and clinic related questions, and the most mind blowing part, it can check if the time requested by the client is available then books it with his info !!! He is asking for $2.5-3K/month depending on the number of calls the agent answers.

I searched about it (asked gpt actually), I found that it is LEGIT and AI can replace our receptionist. My dad is impressed (it will cut costs on him of course).

Does anyone here have experience with something similar or it is a scam?