customer: Hello, I am Lisa Collins. 
 agent: Hello, how may I assist you today? 
 customer: I would like to visit Denver, CO - DEN to attend parents meeting at my children's school. Can you please book me a connecting flight on 06/14? 
 agent: Sure, may I have your source airport code? 
 customer: My origin is at Austin, TX - AUS. 
 agent: Let me know your fare limit please? 
 customer: 500 is my fare limit. 
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 customer: I need to return on 06/16. 
 agent: We found a connecting flight in Southwest airline has fare 200. Shall I proceed for booking? 
 customer: Yes, please. 
 agent: Your booking has been confirmed. 
 customer: Thanks for booking my ticket. 
 agent: Thank you for opting us.
agent: Please mention your return date?