Give one to the NARS clerk

Give one to the NARS clerk
First time shopping in Nars here
A group of shop assistants gathered around to chat, and made customers feel embarrassed to disturb them when they needed an introduction
At the end of the checkout, I was asked if I need a bag?
Is not this nonsensical? I came here empty-handed to buy your stuff
Do you want me to put the bag if you don't give me the bag?
The introduction is not professional at all, but it is good at asking such silly questions
Am I shopping at the vegetable market?