You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: On 04/10, I have to book a flight to participate in Horse racing, so please help me to book a return flight on 04/12.

ASSISTANT: Sure, May I know the journey codes?

USER: Sure, my journey codes are IAD - DFW.

ASSISTANT: May I know your name?

USER: Sure, my name is Ryan King.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No problem, thanks for your support.

ASSISTANT: Thank you for availing us.