input: Write a python function to manage employee data using Flask and Flask-RESTful.
  assert get_employee("John Doe")=={"name": "John Doe", "salary": 10000, "experience": 3}
  assert get_employee("Alice Smith")=={"name": "Alice Smith", "salary": 12000, "experience": 4}
  assert add_employee("Jane Doe", 13000, 5)=={"name": "Jane Doe", "salary": 13000, "experience": 5}
  assert update_employee("John Doe", 15000, 6)=={"name": "John Doe", "salary": 15000, "experience": 6}
  assert delete_employee("Jane Doe")=="Jane Doe is deleted."
output: from flask import Flask, request, jsonify
  from flask_restful import Resource, Api
  
  app = Flask(__name__)
  api = Api(app)
  
  employees = {
      "John Doe": {"name": "John Doe", "salary": 10000, "experience": 3},
      "Alice Smith": {"name": "Alice Smith", "salary": 12000, "experience": 4}
  }
  
  def get_employee(name):
      return employees.get(name, {})
  
  def add_employee(name, salary, experience):
      employees[name] = {"name": name, "salary": salary, "experience": experience}
      return employees[name]
  
  def update_employee(name, salary, experience):
      if name in employees:
          employees[name] = {"name": name, "salary": salary, "experience": experience}
          return employees[name]
      return {}
  
  def delete_employee(name):
      if name in employees:
          del employees[name]
          return f"{name} is deleted."
      return f"{name} not found."
  
  class Employee(Resource):
      def get(self, name):
          return jsonify(get_employee(name))
      
      def post(self):
          data = request.get_json()
          name = data['name']
          salary = data['salary']
          experience = data['experience']
          return jsonify(add_employee(name, salary, experience))
      
      def put(self, name):
          data = request.get_json()
          salary = data['salary']
          experience = data['experience']
          return jsonify(update_employee(name, salary, experience))
  
      def delete(self, name):
          return jsonify(delete_employee(name))
  
  api.add_resource(Employee, '/employee/<string:name>', '/employee')
  
  if __name__ == '__main__':
      app.run(debug=True)