Night shift lobby at five in the morning

I'm standing in our lobby at 5am, but everyone is asleep and the marble floor is covered in sea water up to my ankles. The brass keys on the board are clinking like little bells, and a guest keeps asking me for a room that doesn't exist anymore. I keep saying no, and each refusal makes the water rise a little higher. Woke up before I found out if I drowned or just learned to breathe underwater.