Regular Expression - Finding the proper pattern

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regular-expression

Hi,

I've a system which validates a string (a mail subject line) based on a regular expression pattern.

I provide - Input string and Pattern and it validates yes or no.

I've NO ACCESS to code which does that (or worse, I don't even know what it's coded upon). Just the Regular Expression pattern!

Case 1:

Input: FW: 12334-123-412 my-name test mail
Pattern: \bmy-name\b
Validation: Successful

Case 2:

Input: FW: 12334-123-412 my-name test mail
Pattern: \bMy-name\b
Validation: Failed

I need to make it case insensitive, hence I tried the pattern (?i)(\bmy-name\b)

Input: FW: 12334-123-412 my-name test mail
Pattern: (?i)(\bMy-name\b)
Validation: Failed

Can you help me with the proper pattern, having no knowledge of the comparison code?
or give me a set of possible patterns that I might use to test out?