Scheduled to take the EB CL from Pittsburgh to Washington later this week. Although I have taken 29 between DC and PGH many times, this is my first on 30 from PGH. Do they "assign" seats upon boarding in Pittsburgh as they do on 29 in Washington? What are the chances of getting a window seat? I imagine I can ask for one but will likely be at the whim of the attendant. Obviously it is also largely dependent on the load that day, but for me it would minimize the experience if I have sit in an aisle seat. Hoping a fair number detrain in Pittsburgh leaving plenty of open seats.