Users can enter their Indian Railways PNR number which is used to fetch the PNR status from the Indian Railways website and format/display that in a new page. The Indian Railways website has captcha code.
There are some websites which are using some form of API from Indian Railways to get the job done, and that may be the route here. I haven't researched if these APIs are publicly available. Use PNR number 8620572273 for testing.
BTW - When you bid for the project, please do some background work and let me know how you are planning to get this done. Only then will I award the project.
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