Use
The connected reservation system cannot deliver prices while you are querying the availability of flights because the flight price depends on the combination of all the flights required for a trip (for example, outbound and return flights).
You therefore determine the total flight price after you have completed your flight selection. The flight price is required so that later the ticket can be issued by the travel agency to complete the booking process.
Prerequisites
You have chosen all the flights you require for your trip via an availability query (see also
Determining Available Flight Connections).Activities
Choose
Price.
This function first calculates the total price of the flights and then displays all the travel services with their prices.

The existence of a price is a prerequisite for issuing the flight ticket. If the system cannot determine a current price you can either have the travel agency carry out the price determination at a later date or use a different booking class and restart the price determination.