I suggest "曼迪"。It is a fashion name for beautiful girls.It also similar to your English name,almost sounds same. If you want some particular names,then i will absolutely suggest"仙妮"（xian ni,.this one sounds sweet)."茉莉”（mo li,it's a kind of flower).But these names are sounds different from your English name. So,which one do you perfer?

曼迪 for transliteration,but if u want something more special,lemme know.

according to your english name Mandy: i suggest you name 嫚娣，the same pronunciation as your english name. and 嫚娣in china is a wonderful name for ladys. i don't know what's your second name, otherwise, give a chinese 姓，it will be great. anyway, i am very happy i can meet you, hope you add me as your friend. thanks!

曼蒂 pronounces similar as your english name or you want a different one which is meaningful?

曼蒂 man di