customer: Hello, I am Anthony Perez. 
 agent: Hello, do you need any help from us? 
 customer: I would like to go to a event in Detroit, so could you aid me in booking a flight ticket to Detroit? 
 agent: Sure, could you please share your departure and arrival day? 
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 agent: Ok, may I know your location airport codes? 
 customer: My source and destination airport codes are AUS and DTW. 
 agent: Sorry, there is no flight on your requested travelling dates. 
 customer: That's ok, thank you for checking. 
 agent: You are welcome, have a great day.
customer: Sure, I would like to go on 04/14 and return back on 04/16.