customer: Hi. I am Nicholas White. 
 agent: Hello, how may help you? 
 customer: I would like to book a ticket from DTW on Mar 29, to attend my convocation? 
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 customer: My landing airport code is ORD. 
 agent: Ok, when will you return from ORD? 
 customer: My return journey date is Mar 31. 
 agent: We found a flight from AA airline with 1 connection and the fare is 100 with an economy class.Shall I proceed? 
 customer: You can reserve it. 
 agent: Your ticket is booked with 1015  flight number. 
 customer: Thank you for booking. 
 agent: Thank you for reaching us.
agent: Sure, can I know your source airport code?