customer: Hello. 
 agent: Hello. How can I help you? 
 customer: Can you help me to book a flight ticket from CLT to LAX? 
 agent: Sure. Please provide your travelling dates? 
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 agent: Do you prefer connecting flight? 
 customer: Yes. 
 agent: Is there any preference? 
 customer: I need to depart at evening time. 
 agent: Can I know your name? 
 customer: Karen Brown here. 
 agent: Sorry, there are no flights for your requirement. 
 customer: That's ok, thank you for the information. 
 agent: Thank you.
customer: Feb, 9 and Feb, 11 are my travel dates.