Photo Enhancement for Restaurant Picture

I need a professional photo editor to modify a picture taken at a restaurant in Montreal.

Requirements:
- Realistically enhance my appearance to have a flat stomach and a slightly (around 10%) fitter general torso/belly area.
- Remove the guy behind me by replacing him with background.
- No lighting adjustments needed.
- Background adjustments are not required.

Ideal Skills and Experience:
- Expertise in photo editing and retouching
- Proficiency in software like Photoshop
- Attention to detail for realistic enhancements
- Experience in background manipulation