Thanks Afridi, You will also get you chance to be in Canada Inshallah.Actually I myself wanted to share my experience to the forum so no body get into trouble on Airport.I will be waiting for you I hope you will be here in September.I am rally thankful for your prayers.
About PIA, surprisingly the experience was very very good I can rate that to my Swiss air experience. It was the cheapest available direct flight. There was a ticket which was even cheaper and it was from from Qatar aieways, but that was not a non-stop flight and fortunately I was not able to get ticket to that flight. PIA also gives a 10% discount to the students If you show them your university letter before purchasing ticket they will give you a 10% discount with this discount it is the cheapest