Dear {friend},
Good morning! I hope I am not disturbing you in any way. This afternoon, I need to take care of my son's party. It's not too bad, trust me. I have already planned out the theme, which is dogs, the decorations, and the activities. I want to make this his BEST birthday he has ever had.
As you are a well-known baker, and your cakes are delicious, are you able to help make us a dog themed cake? Maybe add some fondant puppies and bones?
In return, I will send you some of my homemade jam that you loved so much, and you are invited to come celebrate with us! I hope you can make it, both you and the cake.
Thanks for the help,
{signed name}
(If you need to add or subtract anything, feel free!)