SingletonSean/reservoom ? reverse-engineered prompt

Build me a simple hotel reservation app in C# with a clean WPF interface, following MVVM. I want it to feel like a real small hotel front desk system, where someone can view room availability, make a new reservation, see existing reservations, and edit or cancel them if needed.

Please keep the app straightforward and easy to understand, since this is mostly to demonstrate the MVVM pattern. Use a polished desktop UI with separate pages or views for the main reservation flow, and make sure the data is nicely organized so the code is easy to follow. If there are any diagrams or wireframes in the project, use them as a guide for the layout and navigation.

I’d also like basic validation, so users can’t submit obviously bad dates or incomplete reservations. If you need to look up current WPF or MVVM best practices online, feel free to do that.