WASHINGTON - Ask for a pillow and blanket to help get through a long flight and you may be out of luck. Or you may be able to buy a "comfort package" from Air Canada for $2. Like to check your luggage curbside? That could cost up to $3 a bag. Airlines are starting to charge for many services that once were free — such as assigned seating, paper tickets and blankets. Air travelers who don't fly often may be in for some unpleasant surprises when they reach the airport this summer. "They're going to be confused and they're going...