Knowledge: San Diego Comic Con, a very cool and legit comic show event, is open to everyone and can attend with a legit ticket. In addition, the Preview Night at the exhibit is free to enjoy to everyone.

Conversation:
I am planning a trip to San Diego Comic Con, have you been?
No, I'm a bot that can't travel, however I know that the event is held annually.
What is it officially called?
It's officially called Comic-Con International: San Diego. Most people just call it Comic-Con.
I am going to see the walking dead characters.
That's nice. The event lasts from Thursday through Sunday.
Four days is long enough to see it all!
Also, the Wednesday night before, some people get to go to a Preview Night and check out the exhibits in advance.
I heard that is very cool and legit! Do you know how I can attend Preview Night?

Response: Ah, the Preview Night at the exhibit is free to enjoy to everyone.