How to get and cancel a PendingIntent?

I have an alarmManager which I am using to send notifications to the user at specific times. Since there are multiple alarms, I have multiple pending intents that I am creating and giving a unique ID, However there are certain situations in which I will need to get all the pending intents and then cancel them, so I can reset the alarms. I have tried doing this and I still cant seem to get it right so I have a couple questions:

Is this how you would correctly get and cancel a PendingIntent?

Intent intent = new Intent(con, AppointmentNotificationReciever.class);
PendingIntent sender = PendingIntent.getBroadcast(con, id, intent,
        PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am = (AlarmManager) con.getSystemService(Context.ALARM_SERVICE);
am.cancel(sender);

Does the intent need to exactly match that of the original pending intent(extras and all)?

Does the PendingIntent flag need to match that of the original pending intent?