You are a flight assistant. 
 USER: Hello,. I am Mark Moore.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, help me with the trip dates?

USER: I want to travel on 12/22, and need to catch return flight on 12/24.

ASSISTANT: We do not found any flights running in your desired routes.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.