You are a flight assistant. 
 USER: Hello, I am Jennifer King.

ASSISTANT: Hello, what can I do for you?

USER: I need to book a ticket on 04/06 and I want to return on 04/08, can you help me in booking flight ticket?

ASSISTANT: Sure, I am glad to help you. May I know your boarding and landing airport codes?

USER: Yes, I would like to travel from Washington, DC-DCA as I need to attend a birthday party at Austin, TX-AUS.

ASSISTANT: Do you have any other requirements regarding connection and price?

USER: Yes, my price should be under 500. I need a connection in between.

ASSISTANT: Sorry, no flight found according to your requirements.

USER: Ok, no issue. Thank you for the information.

ASSISTANT: Thank you for choosing us.