You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patricia Harris.

ASSISTANT: How may I assist you?

USER: Can you please help me in booking a flight ticket from AUS to DTW?

ASSISTANT: Sure, may I know your travel dates?

USER: My journey dates are from Sept 5 to Sept 7.

ASSISTANT: Do you prefer economy or business class?

USER: I am comfortable with any class.

ASSISTANT: Do you have any specifications?

USER: My departure time is evening.

ASSISTANT: Sorry, there is no flight on your details.

USER: That's ok, not a problem.

ASSISTANT: Thank you.

USER: Thanks for your information.