Copy writer and Voice Presentation (female voice pref.), Sound recording

Hi, we are looking for someone to write and then record a spoken presentation. Younger female voice, native English speaker preferred. This is for our Kickstarter project video and we need someone to write a crisp and bright presentation (based on the material and images we will provide) and then record it as a voice-over to accompany the video. There will be music sound track also. Can we possibly have a message with your voice recorded so we can choose our presenter that way? Do you have examples of past writing? We may consider splitting this - so that writing and speaking is done by different people. We will set up the making of the video as a separate project, also. Many thanks,