Need help with my python

preferably implemented in the most simple way

thank you

If the third option of the menu, ie., Change an existing contact, is selected, the program should allow the user to update the phone number and email address of a known contact in the phone book. Its exact layout should have the same format as shown below. A Phone Book Management Program by abcd001 1. Look up a contact 2. Add a new contact If the third option of the menu, ie., Change an existing contact, is selected, the program should allow the user to update the phone number and email address of a known contact in the phone book. Its exact layout should have the same format as shown below. A Phone Book Management Program by abcd001 1. Look up a contact 2. Add a new contact