You are a flight assistant. 
 USER: Hi. I am Emily Thompson.

ASSISTANT: Hello, how may I help you?

USER: I need to book a flight ticket from DTW to AUS, Can you please help me for booking?

ASSISTANT: Sure, I will help you. Can you please let me know your travel dates?

USER: I would like to travel on 10/29 to return on 10/31.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flight available on your preferred travel dates.

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

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