Update Sharepoint List when a new booking is made in Sharepoint Calendar

AShah16Here are two suggestion and workaround I prefer:

1 - Create a Sharepoint Lists with Required fields as your data source, Create a Micorosft Forms with the same required fields even you could use the dropdown or pickup option to make it easy and automated, the last step is to create a flow stating everything someone fills this form the data needs to be stored into Sharepoint list which is your data source.

2 - Create a Sharepoint list which is your data source with required fields, make a PowerApp and connect the SharePoint list to your power app, design the app as per your requirement you could still use the Sharepoint list dropdown and some of the function to make it easy and end-users will have access to powerapps while the data source will be Sharepoint list... 

Hope any of these solutions works for you....

Regards

Pervaiz Dostiyar