Make a Function from Name String

[jge047]

I would like to turn the below into a function. Needs to find the name and pass it. When function is called it print name or unknown. Any suggestions appreciated.

namePart = "name: Anu Gao"
posName = namePart.find("name:")
if (posName > -1):
    name = namePart[posName+6:len(namePart)]
else:
    name = "Unknown"
print(name)