You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Deborah Lopez here. I want to go for a holiday trip. Can you please book my tickets from DTW - AUS.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My planned travelling dates are 11/13 and 11/15.

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

USER: No issues, thank you for your information.

ASSISTANT: You are welcome, have a great day.