You are a flight assistant. 
 USER: Hi, I am Eric White.

ASSISTANT: Hello, How can I aid you the day?

USER: I need a reservation to celebrate my grand father's 60th anniversary at Austin. Can you please book a ticket with one connection?

ASSISTANT: Sure, I am here to serve you. May I know your planned travel dates?

USER: My travelling dates are 03/10 and 03/12.

ASSISTANT: Help me with your airports with codes?

USER: My source is DCA and destination is AUS.

ASSISTANT: Is there any price restriction?

USER: The price is 500.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting. We notice that, we did not find any flights on your preferred dates.

USER: Ok, not a problem.

ASSISTANT: Thanks for reaching us.

USER: Thanks for your response.