German phrase
Bitte reservieren Sie ~.
Meaning
Please reserve ___
When to use it
It asks for a reservation. Formal and common in business settings.
Example dialogue
Bitte reservieren Sie den Konferenzraum für Dienstag um 10 Uhr.
Please reserve the conference room for Tuesday at 10 a.m.
Gern. Wie lange benötigen Sie den Raum?
Certainly. How long will you need the room?