Booking form fields

In our product pages:
https://www.phuketdreamcompany.asia/tours/honeymoon-package-7-days-6-nights-phuket-no-1
in the sidebar, how can we creaate and transfer the ‘Hotel Pickup” field to our booking confirmation form/email. How can this edit be made and be retained after plugin/theme update?
Honeymoon package 7 days 6 nights Phuket no.1 –
Honeymoon package 7 days 6 nights Phuket no.1. Includes 4 Star Hotel, breakfast, Banana beach & James Bond sunset island tours, ziplining & Phukt City tour.
phuketdreamcompany.asia