customer: Hello, Sharon Thompson here. 
 agent: Hello, how may I help you? 
 customer: I am planning to shoot a documentary to the famous places in Oakland, CA - OAK. Can you aid me for booking with a direct flight? 
 agent: Sure, can I have your trip dates? 
 customer: My trip dates are on 09/22 to 09/24. 
 agent: Help me with the source code? 
 customer: My source is Washington, DC - DCA. 
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 customer: That's Ok, thanks for your information. 
 agent: Thank you for your approach.
agent: Sorry, we do not found any flights running in your given dates.