在英语中，“用餐预约确认”可以用以下表达来表示：

Confirm a dining reservation
Verify a dining reservation

其中，“confirm”意思是“确认”，“verify”意思是“核实”。

下面是一些例句：

Could you please confirm my dining reservation for 7:00 PM on Friday?
I need to verify my dining reservation for two at 8:00 PM tonight.
I received a confirmation email for my dining reservation, but I just want to make sure it's still vapd.
Can you confirm that my dining reservation is for a table by the window?

翻译如下：

请问你能帮我确认一下星期五晚上7点的用餐预约吗？
我需要核实今晚8点的两人用餐预约。
我收到了用餐预约的确认邮件，但我想确认一下它是否仍然有效。
你能确认我的用餐预约是靠窗的那张桌子吗？