Yes, you can now modify review responses posted for Facebook and Google reviews. You can update a response with more information or delete any response made by error.
To make changes to a response you’ve posted:
Access the review response under Reviews for the Location.
Click the edit icon and edit your response.
Click Update to post your response.
You can also delete the response by clicking the Delete icon.
Note: You can edit responses on Facebook recommendations, however, deleting responses isn't supported for Facebook yet.