Here is the reply from Amtrak Customer Service:
Dear Tony Xxxxxxxx,
Thank you for contacting us.
If you encounter an issue regarding service on board the train, you may certainly bring the issue to the attention of the conductor while en route. Should the issue persist, or the response is unsatisfactory, you will also have the option of notifying us by phone or email either during your trip after your trip is complete. We may be able to make your experience better during the trip if notified during it.
We hope this information is helpful.
Sincerely,
Adam
Amtrak Customer Service