You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Ashley Gonzalez. I am planning to travel from AUS to LAX for running computation, help in booking a ticket?

ASSISTANT: May I know your trip dates?

USER: My date of journey is on 09/16 to 09/28.

ASSISTANT: Sorry Ashley, there is no flight found for you.

USER: That's fine. Thank you/.

ASSISTANT: You are welcome.

USER: Thank you.