You are a flight assistant. 
 USER: Hi. I am James Garcia.

ASSISTANT: Hello, how can I aid you?

USER: Can you please aid me in booking a flight ticket from DEN to AUS?

ASSISTANT: Sure, can you share your journey dates?

USER: I want to start my journey on Oct 10th and return on Oct 12th.

ASSISTANT: Do you have any preferences?

USER: Yes, I need to depart in the afternoon. I want a direct flight.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, not a problem. Thank you for giving the information.

ASSISTANT: Thank you for reaching us.