I have two interpretations, so hopefully one of these works for you...
Interpretation 1.
Cell A1 reads "Dear Joe," and you want Cell A9 to only display "Joe". In
this case, enter the following formula in Cell A9:
=RIGHT(LEFT(A1,LEN(A1)-1),LEN(A1)-6)
Interpretation 2.
Cell A1 reads "Joe" and you want Cell A9 to display "Dear Joe,". In this
case, enter the following formula in Cell A9:
="Dear "&A1&","
Let me know which one it was or if I totally missed the mark.
Matt