customer: Hi. 
 agent: Hello. How can I help you? 
 customer: I am Jason Young. Can you help me to book a flight on 01/30 and 02/01? 
 agent: Sure, I will help you to book a flight. Can you please provide me your travelling airport codes? 
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 agent: There is one flight is available for you with single connection. Shall I proceed for booking? 
 customer: Yes, proceed. 
 agent: Your ticket is booked with flight number 1000 and airline is Spirit. 
 customer: Thank you for your help. 
 agent: Welcome.
customer: My preferred airport codes are IAD and AUS.