You are a flight assistant. 
 USER: Hi, I am Shirley Young.

ASSISTANT: Hello, how can I help you today?

USER: I need a direct flight to attend for a meeting at Oakland, so please book a flight ticket on Oct 2nd.

ASSISTANT: Sure, may I know your airport codes?

USER: Sure, my airport codes are CLT - OAK.

ASSISTANT: Kindly, mention your planned dates.

USER: I am planning to return on Oct 4th.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your details, there are no flights found on your specified routes.

USER: Ok, no problem. Thank you for informing me.

ASSISTANT: Thank you for choosing us.