What can I use as proof of travel internationally within 2 weeks?

My boyfriend and I are leaving on July 3rd for a cruise. Due to issues changing my drivers liscense over from one state to another we now have a week to get our passports. I am going to the Philadelphia Passport Agency. The website states you need to bring proof of travel within the 14days but it does not state what you should bring. Any one been and know what documents are will verify I am leaving the country.What can I use as proof of travel internationally within 2 weeks?Bring both a copy of your flight itinerary if you're flying to meet your cruise and a copy of your cruise itinerary, one or both is sufficient as proof of travel but bring everything you have it won't hurt. They just want to be sure you aren't requesting a rush passport needlessly.

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