How to reinstall os x lion after formatting the ssd.

I was trying to install Linux on to an sd card, but selected my drive with lion on it. The installation faild and I lost the whole os.
Just wondering if I should take my Mac into an apple store and see if that can reinstall the os.
Thanks
P.S. My Mac is a Mac book air mid 2011, and is/was running os x 10.7.4.

If it shipped with Lion, or if you have installed the firmware update that was available through Software Update, then you should be able to hold down command-R at startup and boot into recovery mode over the Internet.  From there, you can reformat the hard drive and reinstall Lion.

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