You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please book a flight ticket in my preferable travel dates Nov, 24 and Nov, 26.

ASSISTANT: Ok, may I know your source and destination points?

USER: OAK and SFO are my airport codes.

ASSISTANT: May I know your connection limit?

USER: I would prefer single connection.

ASSISTANT: Is there any class preference for you?

USER: No, thanks.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Your good name please.

USER: Brandon Brown here.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.