Contents of the flights.txt data file:

$1234$#Pittsburgh#Phoenix#$04/02/23$#$10$:$30$am#$108$#$599$#$8$#$500$#

$4567$#Boston#New York#$04/03/23$#$18$:$10$am#$210$#$199$#$12$#$400$#

$9876$#Pittsburgh#Seattle#$04/04/23$#$1$:$30$pm#$110$#$549$#$12$#$600$#

$8888$#Chicago#Pittsburgh#$04/05/23$#$2$:$45$pm#$106$#$399$#$8$#$500$#

$7777$#Pittsburgh#Miami#$04/06/23$#$9$:$35$am#$116$#$459$#$16$#$1000$#

$2892$#Las Vegas#New York#$04/07/23$#$8$:$10$pm#$107$#$489$#$4$#$600$#

$4444$#Pittsburgh#San Francisco#$04/23/23$#$5$:$55$pm#$124$#$699$#$12$#$450$#

$2323$#Atlanta#New York#$04/09/23$#$4$:$30$pm#$110$#$475$#$16$#$500$#

$9281$#Pittsburgh#Seattle#$04/11/23$#$2$:$15$pm#$216$#$890$#$8$#$1000$#

$1000$# Pittsburgh#Phoenix#$04/12/23$#$3$:$25$pm#$150$#$499$#$8$#$500$#