I reserved a room for tonight.我预订了一个房间

今天的几个句子是有关在饭店的服务台的：1.Is there a room available for tonight? 今天晚上有空房间吗？2.I'd like a key to room 809, please. 请给我809房间的钥匙。3.What time does the dining room open? 几点吃早饭？4. Can you keep my valuables? 我可以把贵重物品存这儿吗？