Just as JB007 will, i too had a little help getting my first commercial interview, but there are two things that will get you the job, trust me it ain't sense of humour, although it helps.
Firstly and most importantly, have a bloody good answer and proof to the question of " How many flying hours have you done in the last 6 months?"
The other, unfortunatly, is does your face fit the airline you are applying for.
Keep flying and keep applying.
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" Well it looked like a runway from up there!"