I need a postal order, please. 请给我一张汇票。

　　Here you are. Please write the name, address in clear letter and the sum of money in words, not digits. 给你。请你写清姓名和地址，金额数要用大写而不是数字。

　　I'd like a money order. 我要一张汇款单。

　　Exucuse me. I'd like a money order. 打扰一下，我要一张汇款单。

　　Here you are.  给您。