For those people who mislead others, if you are not 100 percent sure, please do not mislead others. The passport number and date of birth must be on the E-ticket. Otherwise How do you check-in in the airport? Just by your name?. If what LZ saying is true, the information including passport number and DOB should have been saved in the travel agent's system and this is not first time the LZ to buy the air ticket with them. LZ should confirm with the travel agent.