Hi ashley,
Thank you for your inquire.

So you want to have full length hours for your working time.

Yes you can set that up, you can check that on our demo sites 

https://wpamelia.com/demos/

Hi ashley,

You can create services where the duration will be for example 2h, 4h and also set the default time slot step to be the full length. Also, there is an option to use service duration as the default time slot step in the Amelia Settings. You can check this option on this link.

If you go to 

https://wpamelia.com/demos/

you can see that there is a Back-end button, so you will have access to the back-end of our demo sites where you can try to create your own services and configure the settings in order to achieve your booking form with the desired time slots.