American female voice narrator for short presentation videos

Looking for a female narrator with a typical American accent. We have several short video presentations about our service, and we're looking to replace the current narration with someone that sounds more professional. When bidding, please attach or link to a small sample of your voice. The videos we want narrated are: [login to view URL] (01:17 minutes) [login to view URL] (03:24 minutes) We will also supply a written script for these videos when your bid is accepted. The narration can be done from home, we expect an audio file. The audio file does not need to be edited at all. If you make a mistake, simply say the last sentence again. We will do all the editing ourselves. We expect a narrator with an engaging voice. We've received comments that our current narration is too boring.