customer: Hi, I am Jerry Brown. 
 agent: Hello, how may I support you? 
 customer: I have planned to attend the Demo class of the spoken English in Denver on 04/03. Could you please help me in doing that? 
 agent: Sure, may I know your return date? 
 customer: Ok, I intend to return on 04/05. 
 agent: Where do you want to travel from? 
 customer: I intend to go from BOS. 
 agent: May I know your destination airport code? 
 customer: My destination is to DEN. 
 agent: Sorry for inconvenience, no flights found with your given details. 
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 agent: Thanks for approaching us.
customer: No problem, thank you for your information.