noun
overture
An initial approach intended to begin communication or cooperation.
The diplomat extends an olive branch as an overture toward peaceful cooperation.

Etymology
The French word means opening. A diplomatic or social overture opens the way to further communication, agreement, or cooperation.
More examples
- She invites her estranged brother to dinner as an overture.
- The company rejects its competitor's overtures about a possible partnership.
- Both countries welcome the latest diplomatic overture.
Forms
overture · overtures