Politely decline saying you are meeting someone else
From Create Your Own Story
You politely say no, saying that you have plans with another person already but you would be thrilled to go out any other time. Jason smiles and says he will hold you to your word. He then lets you leave, reminding you you have work tomorrow (7:30 AM at the Men suit department). You leave store after dodging some more fighting over dresses and walk out into the crisp clear city. It is only 9:00 AM and you have the rest of the day to kill. You have so much time, what to do?
Do you:
