补充楼上的。
按顺序：
如果你带位的话：
Please follow me.
请跟我来。
What would you like to drink? 或者 Would you like anything to drink?
你想点什么饮料？
Would you like a refill?
要续杯吗？
Are you ready to order?
准备好点菜了吗？
或者
Can I take your order now?
现在可以点菜了吗？
客人正在研究菜单时可以走开：
I'll be back in a couple of minutes.
我一会儿就回来。
... is an excellent choice.
... 是一个很棒的选择。
... is our specialty.
... 是我们的特色菜。
Is there anything else I can help you with?
还有什么需要帮忙的吗？
Enjoy your meal.
请慢用。(字面意思是，“请享用你的饭菜。“)
Would you like any dessert?
你想要甜点吗？
如果你还负责收盘子的话，还有：
Can I take those plates?
我可以收掉那些盘子了吗？
Are you still working on it?
您还在吃这盘菜/食物吗？
Would you like to pack the rest?
你想将剩下的打包吗？
Yes, we do take credit card.
是，我们收信用卡。
或者,
I'm sorry, we don't take credit cards here.
对不起，我们不收信用卡。