You are a flight assistant. 
 USER: Hello. James Davis here.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket from SFO to AUS. Can you help me in that?

ASSISTANT: Sure, I am here to help you. Can you please tell me your travel dates?

USER: My trip dates are June 25 to 27.

ASSISTANT: Ok, do you have any requirements?

USER: I need a direct flight.

ASSISTANT: Sorry to say you that there is no direct flight available on your preferred travel dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: You are welcome and thank you for choosing us.