Voice-over for ESL dialogues

We are looking for female and male voices with the following English accents (Australian, British, US, neutral) to role-play ESL dialogues. Each dialogue is 700-800 words long and turns out to be 7 min long. All you have to do is to role play and record an audio mp3 file in a high quality. It is preferable if you have a partner with whom you can record the dialogue.