You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Ruth Nelson, I need attend for an emergency in DEN. Can you please aid me for booking from AUS?

ASSISTANT: Sure, can you confirm your planned travel dates?

USER: Sure, my planned journey dates are on Dec 16 and 18.

ASSISTANT: Thank you, do you have any another specifications on this trip?

USER: No.

ASSISTANT: Sorry to say that , no flights are available on your required dates.

USER: Ok, thanks for your information.

ASSISTANT: Welcome, thank you for reaching us.