German phrase
Ich bin gleich zurück.
Meaning
I'll be right back
When to use it
It means you will return soon. It is polite for work or formal settings.
Example dialogue
Ich muss kurz zu einem Termin. Ich bin gleich zurück.
I need to step out briefly for an appointment. I'll be right back.
In Ordnung, danke.
All right, thank you.