Good morning , sir . What can I do for you ?   I want to buy a ticket to Sydney tomorrow .   Right now fight BW159 is the only one available , it is a non-direct one .   What's the exact information ?   It departs at 4:40 pm tomorrow and arrives in Sydney at 10:20 am . the next morning by way of Melboume .   How long is the layover in Melboume ?   About 1 hour . Would you buy it ? 