You can get quick answer of your question by entering here
How to integrate the API without any issue?
You must check the API documents and sample logs carefully before start integration of APIs. Refer to the below API documents:
https://www.srdvtechnologies.com/doc/flight/v8/flight
https://www.srdvtechnologies.com/doc/hotel/v8/
https://www.srdvtechnologies.com/doc/bus/v8/
https://www.srdvtechnologies.com/doc/car/v8/car