Facial expressions on green screen background using blender

Need an animator who works with blender to make short animation video only using blender. Background is going to be plain green screen you only need to animate the head and upper half of the body 1, Scene 1: Boy and girl are next to each other, looking at the screen (i.e at the viewer), scene should look realistic, they need to blink, they should look happy, 5 seconds 2. scene 2: Girl talks for 5 seconds, (i think thats a letter A) boy listens, blinks, , stays smiling 3. scene 3 : Boy talks for 5 seconds (i think thats the letter B) girl listens, stays smiling, 4. scene 4: boy and girl clap for 6 seconds, smiling, blinking 5. scene 5: similar to scene 2, (Girl talks for 5 seconds saying what is the animal doing), however this time the boy turns and looks at her as she is talking 6. Scene 6: similar to scene 3, the girl looks at him as he is talking, he says: what is the dog doing 7. scene 7 : girl says thanks 8. Scene 8: boys says thanks