商务英语写作范文:要求变更汇票日期

　　要求变更汇票日期

Dear Sirs,

　　You require a draft at sight under irrevocable L/C as payment terms.

　　However would you make them a little easier?

　　We would like you to allow us a draft at 90 d/s under an irrevocable L/C.?　　

　　Yours,