1. Authenticate with Google Calendar using OAuth 2.0.
2. Parse user input to extract event details (summary, start time, end time, etc.).
3. Construct the appropriate API request based on the desired action (create, update, delete, list).
4. Send the request to the Google Calendar API.
5. Process the API response.
6. Format the response into a user-friendly message.
7. Display the result to the user.