Rushed buyer

I'm so tired of people buying my items and then requesting I ship the next day! First of all, I'm not a damn store. I have a life and work outside of PM. Second, how dare you tell me you want my brand new designer dress(with tags) worth $698 delivered to Florida in 2 days so that she can wear it for a wedding! Yeah, so you can wear it and then try to return it. I have no control over how fast the shipping is. I also can't change the shipping label to Express Shipping. I just canceled this order and told her I'm sorry I will not be able to ship your dress overnight. I then had two more buyers purchase items and ask me to ship them right away. I'm tired of this!