Adding birthdays and searching for them in a json file

birthday add and search.py

import json

answer='yes'

while answer!='no':
    with open("birthdays_1.json","r") as f_r:
        data = json.load(f_r)
    
    print("\n\nWe have birthdays of the following people...")
    for i in data:
        print ("\n" + i)
    
    ans = input("1. Find somebody's birthday. \n2. Add birthday \n\n")

    if ans=='1':
        name = input("Enter the person's name: ")

        print ("The birthday for {} is {}".format(name, data.get(name, "not in our database")))

    
    elif ans=='2':
        n = int(input("How many birthdays do you wanna add? (max 3 at a time) "))
        i=0
        while i<n:
            print("\nScientist ",i+1)
            new_name = input("\nEnter the name: ")
            new_birthday = input("Enter their birthday (dd/mm/yyyy):")

            data[new_name] = new_birthday

            with open("birthdays_1.json", "w") as f_w:
                json.dump(data, f_w)
            
            print ("Birthday Added!")
        
            i+=1
    
    else:
        print("\nInvalid Choice!")

    answer = input("\nDo you wanna use again (yes/no): ")
        

birthdays_1.json

{
    "Ben Franklin": "17/1/1776",
    "James Watt": "30/1/1736",
    "Albert Einstein": "14/3/1879",
    "Neils Bohr": "7/10/1885",
    "Clark Maxwell": "13/6/1831",
    "Richard Fienmann": "11/5/1918"}