2to3 fails on very simple script

[snippsat]

it's a simple answer. too simple. too simple for 2to3 to do it?

Is there really a problem here at all
python 2.x

#greet.py
def greet(name):
    return("Hello, {}!".format(name))

name = raw_input("What's your name? ")
print 'Hello {}'.format(greet(name))
print('Hello {}'.format(greet(name)))

I run python 2to3.py -w greet.py

#greet.py
def greet(name):
    return("Hello, {}!".format(name))

name = input("What's your name? ")
print('Hello {}'.format(greet(name)))
print('Hello {}'.format(greet(name)))

It only convert the python 2.x print statement to python 3.x print function,
and do not touch python 3.x print function.