第一句：I‘d like to order my breakfast.
我想预定早餐。

A: Good morning. I'd like to order my breakfast.
早上好，我想预定早餐。
B: All right, sir. What will you have?
好的，先生，您要什么？
A: Buttered toast, fresh ham and a cup of black tea.
奶油吐司，鲜火腿和一杯红茶。
B: Wait a moment, please.
请稍等。

Please bring my breakfast at seven o'clock.
请在早上七点送早餐过来。

A: Room service, please.
客房服务部。
B: Is there anything I can do for you?
能为你做什么吗？
A: Please bring my breakfast at seven o'clock.
请在早上七点送早餐过来。
B: All right. I'm glad at your service.
好的，乐意效劳。

向客房服务部说明在房间用餐或是订餐的相关表达还有：

I'd like to have my breakfast in the room.
我想在我的房间用早餐。

breakfast 早餐，lunch 午餐，supper 晚餐，dinner 也指晚餐，但dinner一般指较正式的、丰富的晚餐。