need app made fast.

I need someone to build me a simple appointment booking app

I need a booking app with simple calendar
I need to be able to add booking, then app will send message to client that they are booked, then will send message the day before booking.

and have reminder for me on dashboard of all booking scheduled,

thats all its simple app should be easy to make within hours.

Ill pay $50-100 for app.
then more for updates