What is a good water heater?
What is a good water heater?
user
Well, I can recommend various types of water heaters to you.  We can break them down by how much they cost and what kind of work they do, and how much of a load they can handle.
assistant
I need a gas one
user
Well, there are different kinds of gas heaters, based on the fuel they use.  We can go through various types of them and talk about the pros and cons of each type.
assistant
Natural gas
user