@kushal The journey is tough. Would the people in those meetings agree to you recording them to listen again? You could slow the audio down a bit, then, as well, and start to work through the vocab that's less familiar. You could listen to the recordings over and over, as well, while commuting for example -- that kind of practice can be good for building listening skills.
Otherwise, if you can rip the audio track from any tv shows you like and listen to that over and over that would help too.