Please can you check my script for my 2nd Chinese oral exam!

I have my second oral exam coming up. Each time we are given set things to say. I have to try and included as many structures from the course as possible, so even though they may not be the most natural/most commonly used as long as they are correct that is ok. Though suggestions on other ways to order is very welcome, this is new subject material for me, I've never learnt about eating out in Chinese before!

Here is what I must include this month:

! A greeting.
! Say your elder sister would like to have Chinese tea, and your elder brother and yourself would like to have beer.
! Ask the waiter if they have got any English beer.
! The waiter says no, but they have German beer. So order two bottles of German beer.
! Say you all are very hungry.
! Order a dish that you would like to have first.
! Ask whether the roast duck is good.
! The waiter says yes, so order the duck and two other main dishes you would like to share.

W：欢迎光临。
C：<strike>您</strike>你好小姐，我姐姐想喝一杯中国绿茶，哥哥和我都想喝啤酒，你们这儿有英国啤酒吗？
W：对不起，（我们店）没有。<strike>呢</strike>
 C：要是那样的话， 给我们来两瓶德国啤酒。我们都很饿。先要一碗饺子，（你们这的）烤鸭好吃吗？
W：太好吃了。
C：我们点一只烤鸭，一盘红烧肉，一盘炒青菜， 谢谢。
W：好的，请稍等。