human
How do I fix a flat tire on a bicycle?
assistant
To fix a flat tire on a bicycle, you will need a tire lever and a bike pump. First, use the tire lever to pry off the tire from the rim. Once the tire is off, take out the inner tube and inspect it to find the source of the puncture. If you can't find a puncture, you may need to replace the inner tube. Once you have located the puncture and patched it, re-inflate the inner tube with the bike pump and put the tire back onto the rim. Finally, reinstall the wheel and you're all done!