customer: Hello. 
 agent: Hello, how may I help you? 
 customer: I am Ronald Hernandez. I need to book a flight ticket to attend an interview at CLT, Can you please help me for booking from DEN? 
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 customer: I would like to travel on 09/24 and return on 09/26. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Sorry, there is no flight available as per your request. 
 customer: Ok, no problem. Thanks for your information. 
 agent: Most welcome.
agent: Sure, may I know your trip dates please?