1.   Customers are advised to make seat reservations well in advance.

2.   But not in France, where all the high-speed TGV trains required a seat reservation and conductors warned us against boarding without one.

3.   Passengers could not get seat reservations or printed tickets.

4.   Synagogues are so crowded that many require seat reservations, but by tradition, no worshipper is turned away.

5.   Airlines used the computer systems of their offices in Singapore for seat reservations, officials said.