You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Alexander Taylor. I have a plan to buy a new house in Austin, can you please help me in booking a flight  ticket?

ASSISTANT: Sure, I am here to help you, let me know your travelling dates to search a flight for you.

USER: My travelling dates are from 01/07 till 01/09.

ASSISTANT: Ok, may I know your airport codes?

USER: My travelling airport codes are from SFO to AUS.

ASSISTANT: Ok, give me a moment.

USER: Ok.

ASSISTANT: Sorry. There is no flight available for your request.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome. Thank you for choosing us.