Voiceover for casual game

We have live actors filmed to be implemented into the casual video game; right now they are lacking voiceover. The text is not really big (about 10 to 30 lines depending on character) and is divided between 3 characters. They are:

- old lady in her 60s-70s; at first look - old and fragile.
- young mother about 25 years old; quite fragile as she has asthma.
- a southern states bus driver - a man in his fourties, a bit redneckish, not to bright, but generally a good person.

Optionally, both femeale characters can be narrated by one talented woman;))

We're looking for native English speakers.