IF THE NEW FARE IS EQUAL OR HIGHER THAN
THE FFC, THEN USE BW000191
IF THE NEW FARE IS LOWER, FOLLOW THE
RETAINING RESIDUAL POLICY, REISSUE INTO A
PSUEDO FLIGHT USING BW000192 THEN INTO THE
ACTUAL FLIGHT BOOKING USING BW000191
Subsequent reissue scenario 2: New fare is higher than total remaining credit
No need to add pseudo – like gcc exchg straight no need to click on manual price