The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

than share a CAB and a conversation.
The Big Bang Theory Season 10, Episode 1

l need a CAB.
Breaking Bad Season 4, Episode 7

Don'’t be silly,
you don'’t have to call a CAB.
The Big Bang Theory Season 12, Episode 4

All we know is
they shared a CAB and had a nightcap.
The Big Bang Theory Season 10, Episode 1

No-- it's fine, she likes
to take a CAB or a shuttle.
The Big Bang Theory Season 12, Episode 22