If your ticket was previously on the waitlist but is now confirmed, you will be assigned a seat at the time of chart preparation. For example, if the PNR Status reads 10WL/CNF, your ticket's current status is confirmed. Once the chart for the train journey is prepared, you will be assigned Coach and Seat. Typically, the chart is prepared four hours before the train departs from its origin station. Even if you are not boarding at the origin station, you can expect an update on your seat number four hours before train arrival.