You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Raymond White. Please book me a ticket from DTW to AUS to meet my family friends.

ASSISTANT: Sure, I am gleeful to help you. May I know your journey dates?

USER: I have planned to travel on 12/07 and 12/09.

ASSISTANT: Do you have any specifications?

USER: I need a halt.

ASSISTANT: Sorry, there are no flights found on your trip dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.