Two of my favourite resources for organising client meetings...
10to8 10to8 is a great piece of software that I use for client coaching session and also for paid sessions like Growth Club, Networking Ninjas and Masterclasses.
Add your services.
Add your availability.
Add payment options if you want your client to pay upfront (this is not available on the free option).
You simply sync it with your main calendar so clients can only book when you are available.
The system send confirmation & reminder texts and emails which help with no-shows.
Doodle Doodle is great for organising meetings with multiple people. Just pop on your availability and send the link to the interested parties, asking them to tick all they can make. It's way faster than faffing around with multiple emails. (and it's free - we like free!)