I haven't studied German for a very long time but I believe the answer is;
<span>Danke Herr, haben einen guten Tag.
Sorry If I am wrong..As I said, I haven't studied German in a very long time :)
</span>
Auf Wiedersehen is the most accepted and formal translation. Bye, which is a informal, would translate to Tschuss.
Hope it helped,
BioTeacher101
It is "Tschüss" Hope this helps
Hi is Hallo in german. Hope this helps!