Useful little change released this morning: you can now use your own label for the 'additional comments' box which appears on the last page of the widget. So if you want your guest to enter their estimated arrival time, or a flight number, or any other specific information, you can label the box accordlingly.
If I want to ask for 'Flight number', for example, then I'll put that as my custom label under Settings > Online Bookings > Customize:
Then on the last page of that widget, guests will see a box labelled 'Flight number':
Whatever they type there will be recorded as a note in their booking.
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