AI Receptionist for Android App

I need an AI-powered receptionist for my Android mobile app. The AI should be able to:

- greet and give disclaimer and infomation about our services and what we offer.
- Take payments over the phone
- Send digital products (like zipfile digital information packages) to clients email address

Ideal skills and experience:
- Experience with AI chatbots
- Payment integration systems
- Android app development

Looking for a seamless, user-friendly interaction.