You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you today?

USER: I am Richard Roberts, I want to book a flight ticket to Oakland to attend my brother's wedding anniversary. Can you help me in booking with a connection?

ASSISTANT: Sure, may I know your preferred journey dates?

USER: I would fly on 09/11 and return on 09/13.

ASSISTANT: Ok, may I know your price limit?

USER: Its 200.

ASSISTANT: Ok, can you please share your journey airport codes?

USER: My source is TX-AUS and destination is CA-OAK.

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

USER: Ok.

ASSISTANT: Unfortunately, we did not find any flights according to your specified details.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.