You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am John Martin. I need to book a flight ticket from SFO to AUS, Can you please help me for booking?

ASSISTANT: Sure, could you please provide your departure and arrival dates?

USER: I would like to travel on 05/02 to return on 05/04.

ASSISTANT: May I know your budget for airfare?

USER: I can pay up to 1000.

ASSISTANT: Do you need any stopover in between your journey?

USER: I need a direct flight.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights found on that route.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for availing us.