I have created a table rate it works fine, but if we give wrong pin number it does not shows error message instead it shows as "Sorry, no quotes are available for this order at this time". how can i fix it
The code from this comes from KO which uses CSV file
You can try to edit the CSV file or rather create your own CSV file in your module like i18n/en_US.csv,
And edit there like
"Sorry, no quotes are available for this order at this time","Your text here"
You can also try using inline translation tool that Magento has
Stores > Configuration > Advanced > Developer > Translate Inline > Enable for Storefront