Not sure if you need it or not, but if you need a new ticket then the UC isn't pulling your leg. Mr. Smisek took all the ticket stock out of all the UC's and United customer service centers to save money I guess. So the only way to purchase new tickets or maybe even rebook with new tickets is to go out to the main terminal ticket counters now.
I was unable to purchase a ticket at a United Service Center in ORD a couple weeks ago due to this.
AD