Girl Friday: Your Private Concierge likes to play hard to get. You have to bid if you want the personal assistant's time—and you may get turned down. Potential clients can call, text, or fill out an online form to bid, which includes the task they need accomplished and their preferred price. The private concierge services span practically every chore and errand you can imagine: spending time with or preparing a meal for an elderly parent, grocery shopping, babysitting, overseeing home repairs, and even planning a party or creating a business PowerPoint. If the personal concierge deems a client's bid appropriate, she will accept the job; if she doesn't, she will negotiate with customers.