• Leave taking is essential for housekeeping to say to guests when they are leaving.

Housekeeping : Good bye. 

Guest : Good bye.

 Or

Housekeeping     : Bye 

Guest     : Bye.

• If you are expected to see them again 

Housekeeping     : See you 

Guest         : See you.

Or

Housekeeping     : See you next time. 

Guest                     : Yes, see you.