armis, a few questions:

- What email program do you use (or do you use webmail?)
- What is the airline?
- Did you book direct or through a third-party site?
- What do you remember about the flight you booked? (Time? Flight number?)

You WILL be able to retrieve the information even if you can't retrieve the original email, so don't panic - but if we have a little bit more information we can probably give you better advice.