The Access Queue (QueueAccessLLSRQ) API is used to access a designated queue or to navigate within the particular queue.

The Add Accounting Line (AddAccountingLineLLSRQ) service is used to add manual accounting lines to the Passenger Name Record (PNR).

The Add Arrival Unknown Segment (ARUNK_LLSRQ) service is used to add arrival unknown segments (ARUNK) into the passenger name record (PNR).

The Add Itinerary Info (TravelItineraryAddInfoLLSRQ) service is used to add basic passenger-related content into a Passenger Name Record (PNR).

The Add Itinerary Remark (AddRemarkLLSRQ) service is used to enter information into the remarks section of a Passenger Name Record (PNR).  

The Add Special Service (SpecialServiceLLSRQ) service is used to send a wide variety of teletype messages to carriers.

The Air Availability (OTA_AirAvailLLSRQ) API is used to search for flights and the corresponding class availability information for a given origin, destination, and travel date.

The Book Air Segment (OTA_AirBookLLSRQ)API  is used to book one or more flight segments.

The Book From Air Availability (ShortSellLLSRQ) API is used to short sell direct access airline flight segments from an air availability response.

The Build Invoice And Itinerary (InvoiceItineraryLLSRQ) service is used to generate invoices and itineraries.  

The Calculate Air Tax for Itinerary (OTA_AirTaxRQ) API is used to calculate applicable taxes for one or more air travel itineraries, and for one or more passenger types on each itinerary.

The Cancel Itinerary Segments (OTA_CancelLLSRQ) API is used to cancel itinerary segments contained within a passenger name record (PNR).