The form on this site does not send anything to our server. It works out an estimate in your browser and builds a booking slip, which you copy or send yourself through Zalo, KakaoTalk, WeChat or WhatsApp. We only see what you choose to send us there.
Your browser keeps two small items on your own device: the language you last chose, and the code, date and time of your last booking slip, so it can show them again. You can clear them by clearing this site's data in your browser.