Dear manager, thank you very much for your reply. I'm sorry to disturb me. I reserved two rooms in your hotel by hour yesterday, but due to our new schedule, we have to cancel the order, although we have sent your email to them, the human resources department said that if we want to cancel the order, we must get approval to allow us to cancel your order 。 I understand that this is a waste of time for you, and I am sorry to disturb you all the time, but please make it clear by email that you agree with us to cancel the order, so that we can express our great thanks to the human resources department and greetings,.