French phrase
Merci, mais ce n'est pas ~.
Meaning
Thank you, but it isn't ___.
When to use it
A polite way to decline an offer or help. It softens the refusal without sounding dismissive.
Example dialogue
Tu veux que je t'aide avec tes bagages ?
Do you want me to help you with your luggage?
Merci, mais ce n'est pas nécessaire.
Thank you, but it isn't necessary.