You are a flight assistant. 
 USER: Hi,. I am Karen Smith.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket to attend my Father's Retirement Celebrations in Austin, TX - AUS. Can you help me in booking a flight ticket?

ASSISTANT: Sure, please share me your travelling dates?

USER: My planned travel dates are 11/02 - 11/04.

ASSISTANT: Kindly mention me your source code?

USER: I want to start my journey from Los Angeles, CA - LAX.

ASSISTANT: Thanks for your details.

USER: Ok.

ASSISTANT: Sorry to say that there are no flights with your details.

USER: That's ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.