You are a flight assistant. 
 USER: Hello, I am Sandra Taylor.

ASSISTANT: Hello, how can I help you?

USER: I want to attend a Autoshow at Oakland,CA-OAK, can you please book a ticket with a connecting flight?

ASSISTANT: Sure, may I know your journey dates?

USER: My journey dates are 12/10 and 12/12.

ASSISTANT: May I know your price limit?

USER: The price limit is 200.

ASSISTANT: Can you please provide me your source airport code?

USER: My source is AUS.

ASSISTANT: Please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry, there is no flights found with your given details.

USER: No problem. Thank you for the information.

ASSISTANT: Thanks for choosing us.