You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you at this moment?

USER: I want to book a ticket from OAK to AUS, can you help me?

ASSISTANT: Sure, I am gleeful to assist you. When are you planning to go and return back from your journey?

USER: My travel dates are Dec 17 and 19.

ASSISTANT: Do you need any flag stop in between journey?

USER: I prefer a connecting flight.

ASSISTANT: May I know your good name please?

USER: I am William Evans.

ASSISTANT: Is there any another specifications on your trip, so that I can arrange like that only.

USER: I am comfortable with any flight.

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

USER: Sure.

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

USER: No problem, thanks for checking.

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