You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Jacob Mitchell. I have to attend an interview in QA software solutions at Washington, can you please help me to book a flight ticket from AUS to IAD?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Sure, my journey dates are Aug 31 and Sept 02.

ASSISTANT: Do you have any requirements?

USER: I would like to travel in business class.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.