well mannered 
adjective
Having or showing good manners; polite: they were well mannered and eager to please...
- He's polite, well-mannered and hardly ever swears.
- He was an exceptionally well-mannered and polite lad and a very talented cricketer.
- It is a very polite and well-mannered affair, very British, very orderly.
Synonyms
polite, courteous, well behaved, civil, gentlemanly, ladylike, genteel, decorous, respectful, refined, polished, civilized, cultivated, gracious, chivalrous, urbane, well bred, well brought up
dated mannerly