I very much doubt that you could get US jurisdiction over this. (But I'm not a US lawyer, so don't quote me.)

Because contracts are (in theory at least) free agreements between parties, the parties rights (including pursuit for breach) are confined to the 'four corners.'

In the absence of an express choice of law clause in the contract of carriage, it is the fora of the jurisdiction in which the contract was made that governs.

Some jurisdictions will assume jurisdiction over breaches which occur within their borders, but your circumstances still don't get this into US courts.

Since the Indian agent was acting for an Austrian principal, you might be able to get the Austrian courts to take jurisdiction--but there might be a privitive clause in OS standard contract of carriage which would prevail. I don't know the state of Austrian law on this type of issue.

Typically the courts (esp. in the USA) are more willing to assume jurisdiction on tort claims. But you don't seem to have one here.