Could you please revise my job letter reply

Dear All,

I have sent a job application then the company e mail me about my salary expectation.

How can I reply this letter, the detail as below

Dear AAA,

Very appreciated for your applying a job with BBB Co., Ltd.
. , however, we would like to know your how much expected salary.

We look forward to hearing from you.

Yours faithfully,

...............................................................................

Dear Sir,

Thank you so much for your interest in my skills,My expected salary is around 18,000 bht. and negociable,

I am appreciated to provide you my further information.

Your faithfully,

AAA