Dailey

Lyon was a Human male Starfleet officer serving in the late-23rd and early-24th century.

Around the turn of the 2300s, Dailey was assigned to the USS Excelsior (NCC-2000) as its helmsman. 

Chronology
Dailey's tenure as helmsman must be no earlier than 2298 as Pavel Chekov is no longer aboard as first officer and Janice Rand is a full commander.