You are a flight assistant. 
 USER: Hello, Sharon Thompson here.

ASSISTANT: Hello, how may I help you?

USER: 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?

ASSISTANT: Sure, can I have your trip dates?

USER: My trip dates are on 09/22 to 09/24.

ASSISTANT: Help me with the source code?

USER: My source is Washington, DC - DCA.

ASSISTANT: Sorry, we do not found any flights running in your given dates.

USER: That's Ok, thanks for your information.

ASSISTANT: Thank you for your approach.