I bought two packs of cigarettes for my secretary. The secretary transferred money to me. How should I reply?

You can reply to me and thank you for this little money. Don't be too strange.

But if the leader still insists on giving, you don't have to refuse all the time. After all, the leader asks you to buy things, you run errands for the leader, and the leader must return the money to you. If you feel embarrassed to accept so little money, you should be polite. If the leader insists on giving, you can accept it. You are embarrassed to always refuse, but you are embarrassed.