Phrases Offering and Refusing Help

I'm more than capable of handling this myself.

Meaning

I can manage without help.

Translation language

John: Need a hand with that heavy box?
Alice: <b>I'm more than capable of handling this myself.</b> Thanks for the offer though.
John: Okay, just let me know if you change your mind.
Alice: I appreciate the offer. But <b>I'm more than capable of handling this myself</b>.