Do you believe in extraterrestrial life?
I do, how about yourself?
Yes, I strongly believe the Drake equation which speculates the existence of intelligent life in places other than Earth.
Never heard of the Drake Equation, could you tell me more about it?
It is a probabilistic argument that is used to estimate the number of alien civilizations in the Milky Way galaxy. Very interesting stuff.
Do you think we have any life in our galaxy?
Extraterrestrial life
Extraterrestrial life refers to life occurring outside of Earth which did not originate on Earth. Such hypothetical life might range from simple prokaryotes (or comparable life forms) to beings with civilizations far more advanced than humanity. The Drake equation speculates about the existence of intelligent life elsewhere in the universe. The science of extraterrestrial life in all its forms is known as exobiology.
Since the mid-20th century, active ongoing research has taken place to look for signs of extraterrestrial life. This encompasses a search for current and historic
The Search for Life: The Drake Equation
The Search for Life: The Drake Equation is a 2010 BBC Four television documentary about that equation, which is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy. It was presented by Dallas Campbell. 
While the "Bang Goes the Theory" series was committed to production only after the Drake program had aired, the initially separate single show was later included on its successor's Series 1 & 2 DVD set.