Upvote:5
Staff won't verify your identity. Anyone with a matching name could arrive and check in for your flight. Fortunately, I've never heard of anyone being defrauded out of a ticket in this manner (how many people with a matching name will know that you have booked a flight so they can check in for it before you do)?
In fact, asking for passport details at booking has been quite rare until maybe ten years ago, at least in my experience.
To verify that you match the ticket, the airline will make sure that the name on your identification document matches the name on the booking, and the photograph on the identification document matches you.
As to the changed flight time, yes, perhaps your booking agent should notify you, but it's always safer to check directly with the airline.