The best thing you can do for both yourself and your travel agent is to review the itinerary which they email to you, especially if you've put the itinerary together solely via email. It is so easy to make simple little mistakes and the errors can be corrected at a very low cost if caught within 24 hours. I don't very many mistakes, but we are all human and mistakes do happen. That's simply human nature.
So next time you buy a nonrefundable ticket, please check your itinerary for correct dates, months, airports and times. So many times I have "verbalized" Saturday, February 13th, over the phone, during my recap and they happened to hear Saturday and say, "NO, let me look at my calendar again." It can save a whole lot of unnecessary heartache and extra money in the end for everyone involved. Many travel agents are now personally, financially responsible for errors which are made, which might be their own mistake, so help to protect your friendly travel agent by double checking their work. I personally would rather have that mistake caught now vs. day of travel and no longer any advance purchase to qualify for that same low airfare. The airlines have no mercy and truly don't care if a mistake was made, they'd rather say "oh well" and make excuses as to why they are "losing so much money" so they aren't usually willing to work with the travel agent in regard to errors, regardless who made the mistake. They don't care WHO has to pay the price, but in the end, if you're a business traveller, you do have to travel when you're supposed to and unfortunately, if the travel agent has to "pick up the tab", it creates a hardship. Again, the airlines don't care and in my business it's very frustrating.
Keep in mind that there are MANY cities with the same name and also have an airport. It is sooooo easy to make a little mistake which could cost thousands of dollars. Rochester, MN to Rochester, NY; Charleston, SC to Charleston, WV; Lafayette, LA to LaFayette, IN; Springfield, MO to Springfield, IL; Fayetteville, NC to Fayetteville, AR; Greenville, MS to Greenville, NC to Greenville, SC