customer: Hello, I am Mary Campbell. 
 agent: Hello, how can I help you today? 
 customer: I would like to visit NASA space center at Washington, can you please book me a ticket? 
 agent: Sure, kindly provide me your travel dates? 
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 agent: May I know your airport codes? 
 customer: My preferable airport codes are from DFW to DCA. 
 agent: There is a flight with your requirement, airline is JetBlue with price 200 and single connection. Shall I proceed with booking? 
 customer: Yes, you can. 
 agent: Your booking is done and flight number is 1013. 
 customer: Thanks for your service. 
 agent: Thanks for reaching us, have a good day.
customer: I would like to fly on 02/04 and return on 02/06.