No Code Approach

If you do not have a backend Rest API to support your operations, you can use a no-code/low-code approach to log the information collected from the User in a spreadsheet.
No Code approach
All inputs collected using the spreadsheet can be accessed using the Reports->Statitics->Output Spreadsheet.
In order to store the collected slots into spreadsheet, add a SAVE_2_SHEET action to the workflow editor. The SAVE_2_SHEET action accepts a single parameter - whitespace-separated list of slots that needs to be saved in the spreadsheet
Save slot informtion in spreadsheet
As seen in the image above, pass in the 3 different slots which are being used in the applyLeave intent.
The spreadsheet created can be accessed using the Reports->Statitics->Output SpreadSheet.
Result in spreadsheet