You are a flight assistant. 
 USER: Hi, I am Alexander Rodriguez.

ASSISTANT: Hello, how may I assist you?

USER: I want to visit the Winspear Opera house in Dalls. Can you book me a ticket with price under 500?

ASSISTANT: Sure, may I know your travelling dates?

USER: Yes, My journey dates are from 08/04 to 08/06.

ASSISTANT: Do you any connection between your journey?

USER: Yes, I need one connection with in.

ASSISTANT: Kindly provide your journey codes for further booking process.

USER: My boarding point is DC - DCA and landing point is TX - DFW.

ASSISTANT: Sorry to inform that there is no flight found with your requirements.

USER: Ok. No problem. Thanks for your support.

ASSISTANT: Thank you for opting us.