What is the current time in the conversation?

Passenger: Hey Taxi! Ah great. Thanks for pulling over.
Driver: Where to?
Passenger: Well, I’m going to the National Museum of Art, and ... Excuse me. How long does it take to get there?
Driver: Well, that all depends on the traffic, but it shouldn’t take more than twenty minutes for the average driver. We can get there in less than twelve minutes.
Passenger: Okay. Do you know what time the museum closes?
Driver: Well, I would guess around 6:30.
Passenger: Uh, do you have the time?
Driver: Yeah. It’s half past four. Uh, this is your first time to the city, right?
Passenger: Yeah. How did you know?
Driver: Well, you can tell tourists from a mile away in this city because they walk down the street looking straight up at the skyscrapers.
Passenger: Oh, before I forget, can you recommend any good restaurants downtown that offer meals at a reasonable price?
Driver: Umm ... Well, the Mexican restaurant, La Fajita, is fantastic. It’s not as inexpensive as other places I know, but the decor is very pleasant, and the portions are larger than most places I’ve been to.
Passenger: Sounds great! How do I get there from the museum?
Driver: Well, you can catch the subway right outside the museum. And there are taxis too, but they don’t run by the museum that often.
Passenger: Okay. Thanks.