Professional helicopter ride companies tend to recruit highly professional pilots who are trained or at least polite enough to chat to his or her passengers.
When pilots find it hard to talk, it could be that they a a little shy or just plain rude.
Given the opportunity you should be able to communicate with the pilot via your headset; but they will ignore you if they quickly need to speak with air traffic.
Talk to the pilot as you would with your fellow passengers; as you'll remember too as you would of been instructed how-to during your safety briefing.