Adding Formatted Date To A Messagebox

I have a cell E1 that is actually a vlookup and returns a date. I had to custom format the cell so the value returned looks like "June 2007" instead of "39827". I am running a macro and I need a messagebox to tell the user that they are creating an email for June 2007 (which is really the variable cell E1). Problem is the message gives the date as '6/4/2007' instead of 'June 2007'. I tried using the text() function to format the cell as "mmmm yyyy" but I get a type mismatch error. Below is the code I wrote. The first way shows successful but the date as numeric. The second gives me the type mismatch error: First way:

a = Range("e1").Value
Msg3 = "You are about to create an email for " & a & ". Are you sure?" 'Define msg
Style = vbYesNo + vbQuestion + vbDefaultButton2 ' Define buttons.
Title3 = "Create new file" ' Define title.

Response3 = MsgBox(Msg3, Style, Title3)
If Response3 = vbYes Then ' User chose Yes.
'create email

Second way (mismatch error): a = text(Range("e1").Value, "mmmm yyyy") Msg3 = "You are about to create an email for " & a & ". Are you sure?" ' Define message.
Style = vbYesNo + vbQuestion + vbDefaultButton2 ' Define buttons.
Title3 = "Create new file" ' Define title.