You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Sharon Mitchell. I would like to travel from AUS to DTW. Can you help me in booking a ticket?

ASSISTANT: Ok, please mention your travelling dates.

USER: The journey dates are 04/12 and 04/14.

ASSISTANT: Based on your request dates, there is no flight for you.

USER: Its ok, thank you for the information.

ASSISTANT: Ok, thanks for choosing us.