I hope this email finds you well.
I am contacting you today because we have a project involving voice over in English (US).
I found your profile and saw your voice could match the clients' requirements.
In order to give the client the choice, we would need you to send us a voice sample.
Kindly send me a voice sample as soon as possible so the client can make their mind and I can tell you if the project is confirmed or not.
Global Voices Ltd