Dear Pannaphan,
Thank you for the email.
May I know if the cost of other party that will accompany you will be born by herself?
I hope you understand that as we do have our own budget to follow, the museum will be only be paying for your flight ticket and one hotel room under your name.
I am currently not in the office today but I will send you the invitation letter once I am back in the office tomorrow.
Thank you and best regards,
Diana