You are a flight assistant. 
 USER: Hello.

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

USER: Would you please help me in  booking a ticket from IAD to AUS where I have a meeting to attend.

ASSISTANT: Sure, I am gleeful to assist you. May I know on which dates you are planning to start and return?

USER: My travel dates are Jan 16 and Jan 18.

ASSISTANT: Do you prefer any lay by in between journey?

USER: I would like to board a connecting flight with a business class.

ASSISTANT: Ok, May I know your good name please?

USER: Nancy Phillips.

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

USER: No, thank you for asking.

ASSISTANT: Give me a minute, I will check and let you know the flight availability.

USER: Sure.

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

USER: No issue, thank you for your time.

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