What is the current time in the conversation?

driver (the man) and a passenger (the woman)
W: Hey taxi! Ah great. Thanks for pulling over.
M: Where to?
W: Well, I’m going to the National Museum of Art, and...
M: Sure. Hop in. No problem. Hang on!
W: Uh. Excuse me. How long does it take to get there?
M: Well, that all depends on the traffic, but it shouldn’t take more than twenty minutes for the average driver. And I’m not average. I have driving down to an art, so we should be able to cruise through traffic and get there in less than twelve minutes.
W: Okay. Uh, sorry for asking, but do you have any idea how much the fare will be?
M: Oh, it shouldn’t be more than 18 dollars...not including a...haha...a tip of course.
W: Oh, and by the way, do you know what time the museum closes?
M: Well, I would guess around 6:00 o’clock.
W: Uh, do you have the time?
M: Yeah. It’s half past four. Uh, this is your first time to the city, right?
W: Yeah. How did you know?
M: Well, you can tell tourists from a mile away in this city because they walk down the street looking straight up at the skyscrapers.
W: Was it that obvious?
M: Well...
W: Oh, before I forget, can you recommend any good restaurants downtown that offer meals at a reasonable price?
M: Umm...Well, the Mexican restaurant, La Fajita, is fantastic. It’s not as inexpensive as other places I know, but the decor is very authentic, and the portions are larger than most other places I’ve been to.
W: Sounds great! How do I get there from the museum?
M: Well, you can catch the subway right outside the museum. There are buses that run that way, but you would have to transfer a couple of times. And there are taxis, too, but they don’t run by the museum that often.
W: Okay. Thanks.