You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you  please book a flight ticket from IAD to AUS?

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: Sure, I have planned my travel  dates as June 29 and July 01.

ASSISTANT: May I know your name please?

USER: Sure, myself Barbara Phillips.

ASSISTANT: Do you have any other specifications?

USER: I am looking for single connecting flight.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.