title: Not getting empty string when no input is provided
body: <p><strong>About the Problem:</strong></p>
  <p>The function was required to return names in the format
  <code>Name: first_name, last_name</code>, and return nothing when no input is provided.
  For example;&quot; &quot; would return an empty string</p>
  <p><strong>Issue:</strong></p>
  <p>The function should return an empty string wen no input is provided but giving <code>Name: </code> as an output</p>
  <p><strong>Code</strong></p>
  <pre><code>def format_name(first_name, last_name):
      return &quot;Name: &quot;+ first_name + &quot; &quot; + last_name
  print(format_name(&quot;&quot;, &quot;&quot;))
  #Should return an empty string
  </code></pre>