Well... I'd flip it around.
You are not selling "conflict coaching", you are selling a peaceful, stress-free wedding. (Or something to that effect.)
My sister's business does a brilliant job of this. She is a Personal Move Manager, and her business is Assisted Transitions. She helps people sort out their lives, reduce, reuse, recycle, and usually this is within the context of a relocation involving a major life-change - like seniors moving into an assisted living facility.
Assisted Transitions tagline is "Change is inevitable. We make it easy."
Applying this perspective to your business, maybe your tagline is: "I de-stress weddings", or "Stress-free weddings", "Harmonious weddings, from engagement to retirement".
The gift you give is not "conflict resolution". That is just one step on the path to "marital harmony".
Does that help a bit?

