This is from CFAI website. Certain variations in name are allowed. This should clear up lot of concerns when your middle name/initial is missing on ticket.
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Acceptable Name Variations on IDs
Name on identification Name on admission ticket Acceptable?
Mary J. Doe Mary Doe Yes
Mary Doe Mary Jane Doe Yes
Doe Maria Jane Maria Jane Doe Yes
Maria J. Doe Mary Doe Yes
Maria J. Doe Mary J. Smith No
Cathy Li Li, Hong No
Henry Chen Chen, Gang No
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Acceptable Name Variations on IDs
Name on identification Name on admission ticket Acceptable?
Mary J. Doe Mary Doe Yes
Mary Doe Mary Jane Doe Yes
Doe Maria Jane Maria Jane Doe Yes
Maria J. Doe Mary Doe Yes
Maria J. Doe Mary J. Smith No
Cathy Li Li, Hong No
Henry Chen Chen, Gang No