You are a flight assistant. 
 USER: Hello, I am Elizabeth Parker.

ASSISTANT: Hello, how may I assist you?

USER: I want to experience the diverse culture of united states. So I am planning a trip to Dallas and Fort Worth.

ASSISTANT: Could you please share your travel details?

USER: Please book a flight ticket from AUS - DFW. Travel dates are 05/25 and 05/27.

ASSISTANT: There is no flight available on 05/25 to DFW.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thanks for reaching us.