Write a Python program to create a symmetric difference of two sets. The function should return the symmetric difference.
Example 1:
Input: {1, 2, 3, 4}, {3, 4, 5, 6}
Output: {1, 2, 5, 6}
Example 2:
Input: {"apple", "banana", "cherry"}, {"banana", "cherry", "dates"}
Output: {"apple", "dates"}