I will be arriving at Delhi Airport on 7th May and will need to get to Patiala from there. I will be making my own way there and have thought about getting the Indo Canadian bus. I need to know whether you have to pre book the tickets or you can get the bus by simply just arriving there for the journey. If seats need to be pre booked please advise where the booking is made from. Also it would be grateful is timings of the bus could also be mentioned. Thanks.