PSD files should do... Right? unless your AI guy not sure what you mean by this.

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

Please take your time to provide some feedback which is vital at this point. Thanks.

Dear Ian,

I will be back in 24h with new revision/concept based on updated brief.

All the best.

yes we are liking your designs most at this point

Hello Ian,
Please provide me your valuable feedback on my revised designs.
Thanks