German phrase
Bitte kommen Sie um ~.
Meaning
Please come at ___
When to use it
It asks you to come then. This polite form suits formal plans and appointments.
Example dialogue
Bitte kommen Sie um 15 Uhr.
Please come at 3 p.m.
Gut, ich werde um 15 Uhr da sein.
All right, I will be there at 3 p.m.