If you wish to travel before your citizenship ceremony has been allocated to you, you must travel on your previous passport and permanent resident visa. If either of these has expired, you must get them renewed. You will not be given an emergency ceremony on the basis of an expired passport or visa under any circumstances.
Please be aware that you should never pay for travel arrangements before having a valid passport and visa in your possession. The Department of Immigration and Citizenship accepts no responsibility if you do so, nor will we expedite your ceremony because you have fixed travel dates.