Spanish phrase
No se preocupe.
Meaning
Please do not worry.
When to use it
It politely asks someone not to worry.
Example dialogue
El envío se retrasó y lo necesitamos para mañana.
The shipment was delayed and we need it by tomorrow.
No se preocupe, ya hemos gestionado una solución y llegará mañana.
Please do not worry, we have already arranged a solution and it will arrive tomorrow.