In order to allow your customer to make reservations you have to send them special WWW link (via e-mail or publish on your web page). The link is available in your administration panel (Configuration).
Under this link a customer can book / cancel visits/
If you already have WWW page you can integrate recepcja.info calendar with your web page. All the time a customer is not leaving your web page.
The following HTML snippet has to be added to your webpage:
<iframe frameborder="0" src="WWW CUSTOMER ADDRESS" width="450px" height="300px"> </iframe>
Then your webpage will allow visit booking easily.
By default your customer will see specialist list, you can show calendar directly as well.