This sounds like an interesting project that I would like to work on, but unfortunately the payment is not guaranteed. Making the payment guaranteed will draw higher quality designers giving you a better chance at receiving more quality submissions. Guaranteeing the payment shows that you are serious which means the designers will be more serious as well. If you decide to guarantee the payment please let me know

Hello,

Sir/Madam,

I’ve submitted FOUR samples (Design id #15803437, #15803436, #15803435, #15803434) with keeping your suggestion in my mind. Please take a look on the samples that I gave you and please send me feedback about your decision of the samples.
Thanks &regards