Good morning/evening, Sir/Madam! I am XXXX. I am very interested in a job
that is described in your hunting post. Would you mind telling me more about
it?
if not:
Good morning/evening, Sir/Madam! I am XXXX. Are there any vacancies?
I am really interested in this category.
With vacancy post billed - 有招聘通告
Good morning, I saw the vacancy post outside for a store salesman, I like to apply for the post.
If no post billed -如沒有招聘通告
Excuse me Sir, I wish to know is your shop hiring any salesman? I am very interested about the job if you do.