conciliatory
Meaning: friendly, agreeable
Usage: I took Amanda’s invitation to dinner as a very conciliatory gesture.
congenial
Meaning: pleasantly agreeable
Usage: His congenial manner made him popular wherever he went.
accommodating
Meaning: helpful, obliging, polite
Usage: Though the apartment was not big enough for three people, Arnold, Mark, and Zebulon were all friends and were accommodating to each other.