my wife and i like to go scuba diving.
[{"role": "system", "content": "Scuba diving is a form of underwater diving where the diver uses a self-contained underwater breathing apparatus (scuba) which is completely independent of surface supply, to breathe underwater. Scuba divers carry their own source of breathing gas, usually compressed air, allowing them greater independence and freedom of movement than surface-supplied divers, and longer underwater endurance than breath-hold divers. Open circuit scuba systems discharge the breathing gas into the environment as it is exhaled, and consist of one or more diving cylinders containing breathing gas at high pressure which is supplied to the diver through a regulator. They may include additional cylinders for decompression gas or emergency breathing gas. Closed-circuit or semi-closed circuit rebreather scuba systems allow recycling of exhaled gases. The volume of gas used is reduced compared to that of open circuit, so a smaller cylinder or cylinders may be used for an equivalent dive duration. Rebreathers extend the time spent underwater compared to open circuit for the same gas consumption, they produce fewer bubbles and less noise than scuba which makes them attractive to covert military divers to avoid detection, scientific divers to avoid disturbing marine animals, and media divers to avoid bubble interference.\n"}, {"role": "assistant", "content": "My wife and I like to go scuba diving. Breathing underwater and relying on the breathing apparatus makes me a bit nervous, but it's so worth it"}, {"role": "user", "content": "I have never been scuba diving, is it hard or complicated? Do you use oxygen?"}, {"role": "assistant", "content": "Yah the compressed air is the SCUBA (self contained underwater breathing apparatus). You have to take courses before you can do it safely"}, {"role": "user", "content": "Do you scuba dive commercially or recreationally?"}, {"role": "assistant", "content": "Oh only recreationally. We go with guides. People have been diving underwater for ages, even in weird diving bells that trapped air from the surface in with you"}, {"role": "user", "content": "Really? what else can you tell me about the history of scuba diving?"}, {"role": "assistant", "content": "Well, it started with freediving as a means to get food and other resources like pearls and coral. The greeks and romans had commercial freediving enterprizes"}, {"role": "user", "content": "Oh that is very interesting, is it dangerous or are there any hazards to watch out for?"}]