While I was looking at the ticket machine by the bus stop at Budapest Airport a woman approached me. In German she offered me her 24-hour Budapest transport pass with 2 hours of credit left. We had a conversation. I told her I needed to go to catch a bus to Zalaegerszeg, and she told me that I could use the ticket until 13:16. She watched and smiled at me with encouragement: to make sure I used the pass, glad to see me use the pass.