Its doesnt work like you said it exactly, so i’ll try and explain.


I would have done as follows:

Add new flights to booking 2, but leave original flights in booking and commit. This means Im holding both sets of flights. Check required Avios and difference in tax, advise this to customer along with amend fee and check they are happy to proceed.

Cancel bookings 1 and 3.

Go back to booking 2 remove the original flights and commit change. Complete change ie reissue front office if possible or queue to back office.