I can help decipher the string.
M1SOLLE/JOSUHUA EQHSLJX ATLMEMDL 0254 003Y28C 10C3JIJI7O4M28C
The origin, destination, and airline can be found in the 8-character string, "ATLMEMDL". In this case Atlanta to Memphis on Delta Airlines" The first three letters are the origin airport code, the next three are the destination airport code, the last two are the airline code.
Airline codes can be found here.
Airport codes can be found here.
The next set of four digits is the flight number, "0254", or flight 254.
The next chunk begins with a 3-digit sequence number for the date (January 3), the ticket class ("Y") and seat ("28C").
Similarly, the second example decodes as follows:
M1DEY/CHIRANJIB MR EPAELYA CCUBOM9W 0628 225Y018B0029 100
- Origin: (CCU) Netaji Subhash Chandra Bose International Airport
- Destination: (BOM) Chatrapati Shivaji International Airport
- Airline: (9W) Jet Airways (India)
- Date: (225) August 13
- Flight: 628
- Seat: 18B
I am not aware of an open source library for parsing this.=