If your site uses a two-step checkout, you can send the guest-details step to HubSpot so you can build an abandoned-booking workflow.
How it works. A server-side integration sends each Continue click to HubSpot through the HubSpot Forms Submission API. The submission includes the HubSpot visitor cookie, so it attaches to the visitor’s existing tracking record.
What you need. Your HubSpot portal ID, the target form ID, and a HubSpot form whose fields match the data being sent (name, email, phone).
This is custom work and needs to be scoped individually.