I was invited to speak at PyTennessee in Nashville, TN, so I travelled domestically to speak. The event offered me a discounted ticket to buy, and I was not paid to speak. The event assisted with part of my travel and accommodation. My employer did not pay my travel expenses, and I took unpaid time off to speak. My speaking slot was 30 minutes for this event, and I had a great time. I'm a woman who has been speaking for 8 months. This was a not for profit event. Also, I think that if I had ask them to refund my ticket, they absolutely would have - but I didn't know to do that.