Your manager just told you that you need to work this weekend. You have plans you do not want to change. What would you do?
Tell your manager that you will work all weekend.
Tell your manager that you can work this weekend, but you need to change some plans.
Ask other workers if they can fill in for you over the weekend.
Tell your manager you cannot work. Your weekend plans are important to you.
Tell your manager you can work, but then call in sick.