You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your good name please?

USER: I want to attend a foot ball match at Oakland,can you please book a ticket? Sure, I am Scott Carter.

ASSISTANT: Sure, let me know your journey details?

USER: My airport codes are from DC-DCA to CA-OAK. My travel dates are 01/04 to 10/06. 01/04 to 01/06.

ASSISTANT: Sorry to inform that no flights found regarding to your specifications.

USER: Ok, no issue. Thank you for your help.

ASSISTANT: Thanks for contacting us.