Glossary entry (derived from question below)
English term
I'm a chance
They are talking about casting a fishing rod.
Thanks in advance,
Non-PRO (2): Yvonne Gallagher, Cilian O'Tuama
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Responses
France
Translating the message, not just words.
Native in: English 
Works in: French to English, English, French
I'm in with a chance
When you search ' "I'm a chance" aus ', quite a few sports articles come up, see example below.
| agree |
Yvonne Gallagher
: the way I read it. Never seen it as "I'm a chance" . Basically seems to mean I've got a chance
20 mins
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| agree |
Sarah Maidstone
2 hrs
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United States
BA in Transl., MA in ESL, 15 yrs of exp.
Native in: Portuguese 
Works in: English to Portuguese, Portuguese to English, Spanish to Portuguese, and 2 more.
I may or may not succeed
Germany
Highly qualified, social sciences
Native in: English
Works in: English, German, Afrikaans, and 9 more.
I'm a candidate
Could it be that the author is toying with the idea that the person waiting for the casting interview is comparing himself to a fish? He would be a chance catch. Perhaps he sees himself as a prize (catch)?
Discussion
Sounds like Aiivv uhhh chanssss...... could be I have a chance, I have got a chance, shortened to I've a chance...
Is like em Portugues Nada de isso becomes Naaa jjisss ?