Gmail automatically adds events from the emails you receive from the booking sites to your Google Calendar. However, you must have enabled Smart Features and Personalization in your Gmail settings.

Google add s button to Gmail making adding an event to calendar easier than ever. By clicking one button you can stay organized.

While setting up Calendar, you may notice additional options to sync email and contacts. Allowing these features allows you to access Gmail and Google Contacts directly from your iPhone.

Detailed by Google, “With this update, Gemini will automatically detect calendar related content in your email and an ‘Add to calendar’ button will appear.

OpenAI announced that it has added connectors to Gmail, Google Calendar, and Google Contacts for ChatGPT Plus users, enabling ChatGPT to use data from those apps within ChatGPT chats.