iPhone: getting a call status

When sending an email we can get a status for the user action if the email went through, was cancelled, error etc. (sms has the same functionality with different function)

- (void) mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
{
    NSString* mailResult;
    switch (result)
    {
        case MFMailComposeResultCancelled:
            mailResult = @"e-mail cancelled";
            break;
        case MFMailComposeResultSaved:
           mailResult = @"e-mail saved";
            break;
        case MFMailComposeResultSent:
            mailResult = @"e-mail sent";
            break;
        case MFMailComposeResultFailed:
            mailResult = @"e-mail sent failure: %@", [error localizedDescription];
            break;
        default:
            break;
    }

is there something simillar for phone calls? because the system "phone call" message box has a call & cancel button and I wish to know when the user pressed cancel.

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:[NSString stringWithFormat:@"telprompt://%@",self.phoneNumber]]];