履行承诺用英语怎么表达？do what you say?

Thank you sir. Your food will be delivered to your room in about 30 minutes.
谢谢您，先生。菜品将在大约30分钟后送到您房间。

Key words: 
deliver v. 送达；→ 履行；deliver on my promise；翻译：你会履行你的承诺吗？
→deliveryman 配送员；→ delivery n. 配送服务；翻译：是谁提供配送服务呢？Who will provide the delivery (service)？