I am trying to book train tickets for the overnight train from Venice to Vienna for 3 people - 2 adults and a kid. Trenitalia website does not show availability of Smart fares. Surprisingly there is even no discount for 4 year olds as the child discount is for 6 and above.
Italiarail shows availability of smart fares but after I provided my credit card info and try to purchase, it tells me that it cannot be confirmed in the trenitalia system but continues to show their availability.
Not sure what's happening and if there is another way to get Smart fare or if they are actually sold out. Thoughts and tips?