Maybe it's your sentiment, but it is only daily connection for Gonda, Mankapur, Basti, Khalilabad, many small stations in Bihar to Kolkata. And in bihar we call it 'Kathgodam' only. None of your 'Billi' stuff.
Important Note:This website NEVER solicits for Money or Donations. Please beware of anyone requesting/demanding money on behalf of IRI. Thanks. Disclaimer: This website has NO affiliation with the Government-run site of Indian Railways. This site does NOT claim 100% accuracy of fast-changing Rail Information. YOU are responsible for independently confirming the validity of information through other sources.