customer: Hello, I am Stephen Perez. 
 agent: Hello, how may I help you? 
 customer: I would like to visit Houston Zoo in Houston, so could you please book a ticket for me? 
 agent: Ok, may I know your location which you want to take a flight? 
 customer: Sure, My source and destination airport codes are DCA and IAH. 
 agent: Sure, on which dates you are willing to travel? 
 customer: I would like to go on 02/09 and return back on 02/11. 
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 customer: Ok, ensure it is a single connecting flight. 
 agent: Thanks for your patience, there is a flight-1029 with price 200 of Spirit airline. Shall I proceed? 
 customer: Ok, please proceed for further if it costs you below 500. 
 agent: Ok, your reservation is done with your name. 
 customer: Thank you for booking. 
 agent: Welcome, have a safe trip.
agent: Please wait a moment, let me check.