Wrote a program to get reverse of a string in python doesn't work fine

Question

First I wrote a statment to reverse a string

name="geoffrey"
reversename=name[len(name)-1:-1:-1]
print("Ther reverse of the name is ",reversename)

which doesn't return the reverse of the name ,then changes the value

name="geoffrey"
reversename=name[len(name)-1:0:-1]
print("Ther reverse of the name is ",reversename)

works but returns only yerffoe