Custom Error Message

Awesome plugin you have, and it’s working perfectly fine.
I just have a suggest I would like to pitch; The Error Message.

Default error message says, “There are no shipping methods available. Please ensure that your address has been entered correctly, or contact us if you need any help.”

Now may we please be able to change this, and have a custom massage like, “Please make sure your order above $10 or more..” or something??

Thanks.