adjective - pleasantly easy to approach and to talk to; friendly; cordial; warmly polite: an affable and courteous gentleman
affability, affableness, noun
affably, adverb
amiable
adjective - having or showing pleasant, good-natured personal qualities; friendly; sociable;
amiability, amiableness, noun
amiably, adverb
conciliatory
anjective - tending to make or to overcome the distrust or animosity of; actions used to regain or try to regain (friendship or goodwill) by pleasant behavior.