Sentence structure: V 还 V 不来 呢
V 还 V 不来呢 can mean out of someone's mind or out of someone's ability.

"有人" = someone 

"請" can translate to invite , which means someone think you are capable to do or you are a great candidate.

Under the respondent assessment(feeling), he does not think this way, or respondent think chance just wont happen on himself.