Tell me how you would solve this problem

You are an assistant manager at a small consulting firm. You ask one of the employees that works for you to drop off a package at the post office after work on Tuesday. The post office is right on his way home, but it is very out of the way for you. The package is especially important, and it must arrive at its destination by the following day: Wednesday, at noon. The package has a document that will be discussed at an important meeting with business partners that will only be in town for one day. Although you will not be at the meeting, your manager and the CEO will be in attendance and both of them have entrusted you with making sure that the package arrives. You find out on Wednesday afternoon that the package never arrived. You are responsible for the mistake. What do you do