1.

我要早上8:00设定电话叫醒。 I would like to have a morning call at 8:00 in the morning.

2.

我要食物送到房间的服务。 I'd like to order room service, please.

3.

我要单人房。 I'd like a single room.

4.

我要两张床的房间。 I'd like a double room.