title: Microsoft bot error - Exception: invalid need: expected Call, have Poll
body: <p>I keep getting this error and I don't know how to fix it: Exception: invalid need: expected Call, have Poll</p>
  
  <pre><code>            PromptDialog.Text(context, setEmail, "What is the contact's email? "); 
              PromptDialog.Text(context, setPhone, "What is the contact's phone number? ");
  
  
      private async Task setPhone(IDialogContext context, IAwaitable&lt;string&gt; result)
      {
          this.contact1.Phone = await result;
          ReturnContact(context, contact1);
  
      }
  
      private async Task setEmail(IDialogContext context, IAwaitable&lt;string&gt; result)
      {
          this.contact1.Email = await result;
          ReturnContact(context, contact1);
      }
  </code></pre>
  
  <p>the prompt dialogs are part of a different method. How do I prompt the user twice in a row without getting this error? </p>