Create ASP.NET Login page for existing website

We have an existing webpage based on ASP.NET using Telerik Webcontrols. The website can be found here. [login to view URL] we would like a Login area (right side), the attached image shows how this would look like. We also want a masterpage construction with a custom header and footer. (the personal starterkit from asp.net is fine). Finally it should be possible to make a reservation using the "Reserveer" button. this reservation then must be confrmed by the user and then saved to the database (SQL Express).