JavaScript: Using Objects for Lookup

i honestly don’t know whats wrong with the code

// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
    var lookup = {
    "alpha" : "Adams",
    "bravo" : "Boston",
    "charlie" : "Chicago",
    "delta" : "Denver" ,
    "echo" : "Easy" ,
    "foxtrot" : "Frank",


  };
   // Only change code above this line
  return lookup[val];
}

// Change this value to test
phoneticLookup("bravo");

can you provide a link to the challenge?

also looks like you have an extra comma at the end of this line…

https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/using-objects-for-lookups