Attending a conference

This is my first year as a full-time employee as I graduated last year from University, and my company offered me to attend a Transportation conference in another province (I am Canadian). I am a Transportation Designer and I spend most my days designing roads from home, this conference spans 4 days with multiple lectures (presentations or discusson panels) which we choose based on our interest/field that it relates to.

I have no idea what to expect from this conference or what exactly to say when introducing myself to people at the conference to make connections. Any tips would help!