US Visa Appointment in Montreal/Ottawa

[lavi]

Hi,

I have been looking for an appointment in US Consulate for last 2-3 weeks at different time intervals. So far I haven't had any luck finding a single open appointment in Montreal or Ottawa. Can someone please provide me any suitable time or day I should be looking for appointments. I need to fly to US in October.
Or any other way through which I can get an appointment.

Please advice.