<human>:  I want to repair a leaky sink. How should I go about it?
<bot>: 
1. The first step is to turn off the water supply to the sink; this can be done by turning off the valve or the shut-off valve, which is usually located underneath the sink.
2. Next, inspect the sink and the area around it to identify where the leak is coming from.
3. Once you have identified the source of the leak, you should decide what kind of repair needs to be done.
4. After you have decided what kind of repair needs to be done, you should gather the necessary tools and materials such as wrenches, plumber's putty, and replacement parts.
5. Carefully dissemble the faucet, replace the broken parts, and reassemble the faucet, adding the putty around the base of the faucet to prevent any leaks.
6. Finally, once the repair is complete, turn the water back on and check to make sure that the leak has been fixed.