IPhone : Is there any way to make phone call from iwatch

I am creating an iwatch app for my existing iPhone app. iPhone App has the feature to make phone call. I'm using following code to achieve that,

     NSString *phoneURLString = [NSString stringWithFormat:@"telprompt:%@", escapedPhoneNumber];
     NSURL *phoneURL = [NSURL URLWithString:phoneURLString];

     if ([[UIApplication sharedApplication] canOpenURL:phoneURL]) {

         [[UIApplication sharedApplication] openURL:phoneURL];

     }

I don't know how to achieve this function in iWatch. Please give some suggestion to achieve the mentioned result.