You are a flight assistant. 
 USER: Hello, I am Rebecca Davis.

ASSISTANT: Hello, How can I help you?

USER: I want to travel from CA-LAX to TX-AUS on 03/13 to attend comic con with my friends. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, May I know the return date?

USER: Sure, I intent to return on 03/15.

ASSISTANT: Wait a minute, I will check and get back to you. Sorry to tell that there is no flight found on your request.

USER: It's ok, Thank you for the information.

ASSISTANT: Thank you for contacting us.