You must also reconfirm flights after each stop over. Some airlines require this reconfirmation otherwise they do cancel your seat without your knowledge, especially in peak seasons when they are overbooked. You are also required to leave a telephone contact with the airline and with your travel agent so that you can be reached throughout your trip if there is a schedule change. Before visiting a foreign country or making a stopover be sure to check the visa requirements directly with the consulate of that country. It is important for you to know the rules and restrictions of the ticket you are going to purchase.
Most tickets are very restrictive and some are non-refundable.
Be sure to understand the conditions of your ticket in case you want to change itinerary or make cancellations later on. Tell your travel agent or the airline about any special dietary or medical requirements or if any member of your party needs special assistance. For international flights you must check in minimum of two hours prior to your departure. Late arrivers may be denied boarding when flights are overbooked. Request your seat assignment, if possible at the time of your reservation.