The function append does not add to my list, but rather changes the original

import datetime 
from datetime import datetime 
A = True 
while True: 
    try:
        if A == True:
            input_user_bd = input('inter your barth day and your name(dd-mm-yyyy,the name):')
        else:
            input_user_bd = input('add your barth day and your name to the list '
                                  'dd-mm-yyyy,the name)\nif you want to delete the list enter(clear):')
        date,name = input_user_bd.split(',')
        bd = datetime.strptime(date, '%d-%m-%Y')
        break
    except ValueError or AttributeError:
        print('error')



    def calculate_age(bd):
        today = datetime.now()
        return today.year -  bd
    calculate_age(bd.year)



    def print_age(th_name,age):
        print(th_name,'you are',age,"years old")
    print_age(name,calculate_age(bd.year))



    people = {
        'the name':[],
        'the date':[]
    }
    people['the name'].append(name)
    people['the date'].append(date)
    print(people)

    A = False
    if input_user_bd == 'clear':
        break

The following are the command line inputs and outputs:

inter your barth day and your name(dd-mm-yyyy,the name):11-11-2001,a

a you are 22 years old

{'the name': ['a'], 'the date': ['11-11-2001']}

add your barth day and your name to the list dd-mm-yyyy,the name)

if you want to delete the list enter(clear):11-11-2001,AA

AA you are 22 years old

{'the name': ['AA'], 'the date': ['11-11-2001']}

add your barth day and your name to the list dd-mm-yyyy,the name)

if you want to delete the list enter(clear):