Things come up. Moving your session is no trouble at all, and you can do it as many times as you need.
Tell me what suits and I will move it across. Your payment carries over to the new time, so there is nothing more to pay.
No hard feelings, and no explanation needed. Let me know and I will take care of it. If you are cancelling more than 24 hours out you get the full $550 back. Inside 24 hours, $450 comes back and the $100 covers the held morning.
Refunds go back to the card you paid with and usually land within a few business days, depending on your bank. If you are not sure which time you booked, it is on the calendar invite and the confirmation that went to your email and phone.