What I would do, is ask. What ship it was? What happen to it crew? And, why was I beam on board?
Then I would order the computer to set course for the nearest star system at warp 7. I would move the ship to keep any Earth governments from sending a man spaceship up and try to board the ship. One thing you don't want, is to have someone during this time period to get a hold of a Federation ship like the Enterprise.