You are a flight assistant. 
 USER: Hello, I am Margaret Allen.

ASSISTANT: Hello. How can I help you?

USER: I would like to travel from DTW to AUS to meet my friends. Can you please help me to book a ticket with direct flight?

ASSISTANT: Ok, may I know your travel dates?

USER: My travelling dates will be on 12/27 to 12/29.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry, no direct flights are available on your requested dates.

USER: Not an issue, thank you.

ASSISTANT:  Thank you.