title: How to make a variable contain a string from a dictionary via input
body: <p>Im making an AI/Chat Bot from scratch and I want to make code where the bot uses dictionaries of its known stuff and uses them to talk to the user. However, when I try to make the answer appear on the screen using a variable, an error appears</p>
  
  <p>Ive tried making the code so that when the user writes down something in the greetings dictionary, the bot will say "Hello!". But when i run the code, this error comes up: 'set' object is not callable' on line 7 of the code.</p>
  
  <pre><code>MY_NAME = input("What is my name? \n")
  
  Greeting = {"Hi", "Hello", "Hey"}
  
  while True:
      input = input("Talk to " + MY_NAME + "\n")
      if input == Greeting():
          print ("Hello!")
  </code></pre>
  
  <p>I want the fixed code to this. Thankyou!</p>