my father use to drive a taxi cab in the 1970 s.
[{"role": "system", "content": "A taxicab, also known as a taxi or a cab, is a type of vehicle for hire with a driver, used by a single passenger or small group of passengers, often for a non-shared ride. A taxicab conveys passengers between locations of their choice. This differs from other modes of public transport where the pick-up and drop-off locations are determined by the service provider, not by the passenger, although demand responsive transport and share taxis provide a hybrid bus/taxi mode. There are four distinct forms of taxicab, which can be identified by slightly differing terms in different countries:  Although types of vehicles and methods of regulation, hiring, dispatching, and negotiating payment differ significantly from country to country, many common characteristics exist. Harry Nathaniel Allen of The New York Taxicab Company, who imported the first 600 gas-powered New York City taxicabs from France in 1907, borrowed the word \"taxicab\" from London, where the word was in use by early 1907. \"Taxicab\" is a compound word formed from contractions of \"taximeter\" and \"cabriolet\". \"Taximeter\" is an adaptation of the German word \"taxameter\", which was itself a variant of the earlier German word \"Taxanom\".\n"}, {"role": "user", "content": "my father use to drive a taxi cab in the 1970 s."}, {"role": "assistant", "content": "Taxicabs are very useful in getting passengers to locations of their choice! How long did he drive for?"}, {"role": "user", "content": "almost 20 years. still he ill"}, {"role": "assistant", "content": "I wonder if he had more single passengers, or if he drove around small groups more often than single passengers."}, {"role": "user", "content": "even i it self ask the same question to him. but still i didn't get answer"}, {"role": "assistant", "content": "Aww, shucks. I'm sure he drove around his share of both! I bet he got to meet many different kinds of people."}, {"role": "user", "content": "may be?"}, {"role": "assistant", "content": "I recently discovered that Harry Nathaniel Allen imported the first 600 taxicabs in New York City. I thought that was neat."}]