Hi ,I bought tickets for the Yellow Submarine on Friday night, and I somehow managed to delete the confirmation email. Will I still be able to get in to see the movie

You should be able to. The folks working the ticket booth are really good about it. They should have a copy online to refer to.

You can provide your last name and the credit card you used to book at the ticket counter and they will hand you a physical ticket. On a side note, the email you deleted might still be in the trash folder of your email client.