Could you reserve a room for me, please?

请你为我预订一个房间好吗？

youdao

Could you reserve a double room for me?

你能不能给我预订一间双房？

youdao

Could you reserve a double room from tonight to 20th of this month for me?

你可以为我预订一间双人间从今晚到本月20日吗？

youdao

Could you reserve a double room from tonight to 20th of this month for me?

你可以为我预订一间双人间从今晚到本月20日吗？

youdao