Dear Project Holder
Pls provide your valuable feedback for my designs.
As you can understand no project can be successful without timely feedback & continuous interaction, thus we request you to provide your feedback.
Waiting for your feedback
Thank you

Dear Boss,
Please have a look at my design and let me know if there are any changes you would like.
I’m happy to make revisions as needed until you are completely satisfied.
I’d really appreciate your feedback