You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Anna Hall.

ASSISTANT: How may I assist you?

USER: I would like to travel from DEN to AUS to meet my friend, can you please help me for booking?

ASSISTANT: May I know your dates?

USER: My trip dates are 07/07 and 07/09.

ASSISTANT: Sorry for the inconvenience, there is no flight for you according to your details.

USER: It's ok. Thank you for checking.

ASSISTANT: Thank you for choosing us.