customer: Hello. 
 agent: Hello. How may I help you? 
 customer: I am looking for a flight from HOU to DEN, can you please help me in booking? 
 agent: Sure, I am happy to help you. Can you please let me know your travel dates? 
 customer: My travelling dates are June 23 and June 25. 
 agent: May I know your name? 
 customer: Sure, my name is Stephen Perez. 
 agent: Do you have any preferences? 
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 agent: Single connection flight is available in Southwest airlines and the ticket fare is 200 only. Can I book the ticket for you? 
 customer: Please proceed. 
 agent: Your ticket is booked in economy class with the flight-1015. 
 customer: Thank you for booking. 
 agent: You are welcome.
customer: I prefer economy class flight.