input: Write a function to create a command-line application in Python that stores customer data and allows customers to query by customer name.
  assert print_customer_data("John Doe")==None
  assert print_customer_data("Jane Smith")==None
  assert print_customer_data("Alice Johnson")==None
  assert print_customer_data("Bob Brown")==None
  assert print_customer_data("")==None
output: def print_customer_data(name):
      customers = {
          "John Doe": "Customer ID: 1, Address: 123 Main St, Phone: 555-1234",
          "Jane Smith": "Customer ID: 2, Address: 456 Elm St, Phone: 555-5678",
          "Alice Johnson": "Customer ID: 3, Address: 789 Oak St, Phone: 555-9012",
          "Bob Brown": "Customer ID: 4, Address: 321 Pine St, Phone: 555-3456"
      }
      if name in customers:
          print(customers[name])
      else:
          print("Customer not found")