Here's the answer:
“お客様のお部屋は五階です”
(o kyaku sama no o heya wa go kai desu)
Watch a real native speaker say it:
Here's how it sounds in a textbook:
You could also say:
- お客様の部屋は五階です
Fun fact: the hundreds of thousands of people learning Japanese with Memrise get this phrase correct 90.11% of the time!
