After a long struggle an hard work, Alif is finally appointed as the director of a national company where he work. Many of his friends who work at the same comp

After a long struggle an hard work, Alif is finally appointed as the director of a national company where he work. Many of his friends who work at the same company congratulate him.
Samuel: alif, congratulations. You deserved it, man.
Alif: thank you very much. This a because you always help me.
Sinta: im very happy for you, alif. Now, that you are the director of the company, i believe the company will develop even faster.
Alif: thank you. I cant forget your collaboration with me, and i will still need your help.

Question
What expressions do they use to congratulate alif?