They may tell you everything has been booked but their ticket has been stolen, and you need to send money quickly to get them on the next flight.
The scammer picks it up and asks if it belongs to the tourist, showing a wad of currency, and tries to get the tourist to touch it.
Another person approaches and claims the wallet belongs to him, then accuses the tourist of trying to steal it.
Scammers will often ask you to do this so that you will be communicating directly with them, and may be more likely to reveal personal information.
In this case, you would not receive safety warnings from us, and it would make it more difficult for us to detect them.
Once a virtual relationship develops, the Australian citizen is asked by their friend or prospective marriage partner to send money to enable travel to Australia.