Can you get a discount on a sleeper on Amtrak if you upgrade through the conductor on the train?

Question

Can you get a discount on a sleeper on Amtrak if you upgrade through the conductor on the train?

Answer 1

To the best of my knowledge, no.  You will be charged the full rate.

Answer 2

sometimes yes somtimes its possible (unless that sleeper is booked further down the line (like suppose you rode the chief (to Chicago) from Los Angeles

and then you decide to get a sleeper (if there is available the conductor can sell it to but if you boarded in Los Angeles, the sleeper might be book say from flagstaff

so you would only be able to occupied till flagstaff