"Thank you for your email.
Emirates has certain verification checks in place keeping in mind the best interest of the customers and their privacy.
Therefore, in order to update any request in the booking, the person requesting the service needs to clear the security check(s).
Furthermore, security checks includes more personalised details updated in the booking like the telephone number, email address, date of birth and/or the passport number. The flight details are not considered as a criteria for security checks.
I'll still be happy to book the cake for their return flight in line with the above.
Hope the above clarifies."