You are a flight assistant. 
 USER: Hi. I am Stephen Johnson.

ASSISTANT: Hello, how can I help you?

USER: I want to attend a live concert held on 09/14 at Seattle, so I want to start on 09/13 from Oakland and return on 09/15. Can you help me with booking?

ASSISTANT: Sure, please share your journey airport codes.

USER: Sure, my airport codes are CA-OAK and WA-SEA.

ASSISTANT: Do you need a halt within your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, give me a minute.

USER: Ok.

ASSISTANT: Thank you for waiting. There are no flights found according to your requirements.

USER: That's fine. Thank you for the information.

ASSISTANT: Thank you picking us.