Create a public page for the public to ask for an appointment based on actual calendar

Development
1

I dont know if i am in the right category but here.

Can someone develop a public page where a anonymous user could ask for an appointment based on actual schedule ?

The page could be rendered on drupal or wordpress or other ?

I am willing to finance a part of the operation

2

I´m also interested on the concept.
It would give a huge boost of popularity to owncloud calendar.

4

I am interested to do that .