You may make a reservation for the concert by clicking on the link below and sending the email it creates, after filling in the number of seats you want and supplying your name (and other information if you wish.)
The reservation will be held until 7:20 and then cancelled. A reservation (if you come and get a ticket by 7:20) guarantees you a seat at the concert.

send a reservation email

to with your name, the date of the concert, and the number of seats to be reserved.

You should get an acknowledgement within a day.  If not, contact Diane at 413-336-2589.