Boston
1. you legitimately feel you put them out or at fault at all in this situation?
if your answer is yes offer to get an extra half hour when you do reschedule to make it up to them.when the event arises that it was my fault I did not make a record of the appointment being scheduled. many of times I am out and about and in the middle of a million things I will say yes see you then on the phone then I will space on actually writing it down anywhere! 
next thing you know I'm getting a call at 9 in the morning and saying all geez I forgot honey come on over I'll hurry up and get ready now! never the less if you feel you are the one at fault for cancelling and you really want to make it up to them offer a $50 tip at the next session or if you're able to and have the money maybe offer them to get an extra hour or extra half hour just for having coffee or something nice gesture of the sort.
2. In the events you truly believe on your behalf it was not your fault at all that you politely sent the message is to remind him you will not be there tomorrow. if you truly sent him a message 24 hour notice that you do not owe them anything.I would log out and stop doing the back and forth I am sure you have other things you could be doing that are more important like making money for paying attention to taking care of yourself and your family. next time you could look into booking appointments with someone who has a lot of flexibility with cancellations. in the event I receive a cancellation text call or email I do not respond to it. I received your message they told me they're not coming there is really no point in me responding okay thank you for the message honestly that's a waste of time for me they told me they're not coming great I close the email and continue doing whatever project activities I was doing. if you let someone know 24 hours notice you cannot make it or if you let them know 20 minutes before the appointment that you can't make it. life happens. not to be confused with drama. when life happens and it does to everyone do not get it confused with drama. a lot of people refer to life in life term as drama. if you have an emergency in the family or your car breaks this is not drama its called life!
if you miss an appointment because you have a back strain this is not drama again its called life and again life happens'
next time send them your message concerning the cancellation and that's that you don't need to say anything else or comment anything else and you don't owe anyone an explanation and you do not need to be put on the defense by anyone.
that's life. and in life things come up. pets die family members dying children get rushed to the hospital.
maybe you forgot your son's soccer sign ups for that we can you realize you don't have that 300 to spend all of a sudden.if someone cannot be sympathetic towards life on life's terms and things in life that come up not to be confused with drama!
if someone can not take into consideration that you are a human being with humans things going on in your life and activities you do in everyday life worse things in plans need to change'
I know people knock back page but if you get a cancellation and you're dead set on eating $300 goddamnit post an ad on Backpage for christ sake! for me if I ever had an emergency where I was putting all my eggs in one basket and counting on this one client for his niece least 300! for me I would never put myself in a position where is dependent on anyone'
I also in fluid in scheduling and I do not ever mind a cancellation for me I will always be able to find a penis to f*** for money if that is my plan for the day I will make it happen whether you cancel or I find someone else
if someone is that desperate they are unable to find someone to fill in your place so they can still make that 300 they need so desperately for whatever godforsaken reason
people make fun of Backpage but if you want an appointment within 5 minutes or let's say you want 10 appointments that day'
you can post an ad on Backpage and you will probably get about 20 phone calls in the next hour that's just the way it works
all the time in pre booking and scheduling in screening that goes on on this website it's great but then some of these people the end up putting all their eggs in one basket and they're really dependent on that one appointment for whatever reason
If a person is unable to find something else to do with his hour if I have to cancel for a legitimate reason'
if you honestly cannot find another errand or activity or something else you need to do for yourself too busy yourself with.
running a business whether you are a hooker or a John or you run a dentist office or a hairdressing salon if you do not have the patience or the flexibility to handle cancellations then that is not the right career for you and you're doing bad business and you will continue to have a problem keeping your appointment because people are not going to like that kind of attitude.
3. send your cancellation and move on you don't know anyone apology if they can understand that something came up and they can go pound sand. if they're that hard up for that 300 they were counting on you for the should always have a backup plan and you should never depend on anyone and you should always have a secondary plan in line.I've even had times where I was dead set on doing appointments one time my computer went down hell I went and found a hotel room that had 4 guys in it that we're all their own construction work and I ended up making money off of them is just a matter of going over and talking to them. they were all good looking too and they all had tattoos and they were construction workers and I made it happen. either your survivor or you're someone that crumbles when life happens in life throws you a curveball at you there two different kinds of people in this world.