Pour some for me

A man came to buy shampoo and hair serum. But the serum was out of stock.
Man: Can you give me the tester?
Me: Sorry, I can't. The tester is not to be given away.
Man: But you have no more stock.
Me: The new stock will be in by next week, and we will place the tester back to the shelf.

Man: Can you pour some in the bottle for me?

Me: No, boss. I can't. And I don't have bottle for you.

After a few minutes, the man came back to the shop again.
Man: Can I have some tester? I brought an empty bottle, pour some for me lar?

Me:#@!%@$%^$   (Someone please call 911 for me. HELP!)