(noun) kindness
(adjective) helpful
(expression) thoughtful gesture
(expression) act of kindness
(adjective) thoughtful
(expression) show some gratitude
(noun) gratitude
(noun) help
(expression) lend a helping hand
(adjective) appreciative
(noun) reward
(noun) appreciation
(adjective) rewarding
(verb) appreciate
(expression) show your appreciation
(expressoin) … is its own reward
(adjective) kind
(verb) think
(noun) thought
(adjective) grateful