Trying to schedule an appointment with a client who “absolutely needed to see me ASAP.”

Client: I don’t know a set time, I may want to go to the gym and stuff. Just keep your phone on and I’ll call you a half hour before I want to meet.

Me: I’m sorry, but I have other commitments and other clients I need to meet with that day. If we could set a time that would be appreciated.

Client: Fine, why don’t we all just work around your schedule!