You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I best assist you now?

USER: I am looking for a flight from IAD to OAK, can you help me out in booking the flight ticket?

ASSISTANT: Sure, can you please let me know your travelling dates?

USER: My trip dates are from Apr 4th till Apr 6th.

ASSISTANT: Do you need any specifications in connection?

USER: I am looking for a connecting flight that's it.

ASSISTANT: May I know your good name please?

USER: Myself Karen Clark.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No, thanks for asking.

ASSISTANT: Ok, please wait a moment. let me search a flight for you.

USER: Sure, I will be waiting for your update.

ASSISTANT: Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: That's ok, not an issue. I guess due to inflation all seats were sold out. Anyway, thank you for your information.

ASSISTANT: Thanks for approaching us, wish you a great day.