You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Deborah Adams, can you help me to book a flight ticket from AUS to DEN?

ASSISTANT: Sure, I am here to help you out. May I know your trip dates?

USER: Ok, my travel dates are 10/22 and 10/24 respectively.

ASSISTANT: Sorry Adams, there is no flights in your route with your dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.