You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to attend for a board meeting with my clients in Houston, TX - IAH. Can you aid me for booking from Washington, DC - DCA?

ASSISTANT: Sure, may I know your planned journey dates?

USER: Sure, my planned journey dates are 03/09 to 03/11.

ASSISTANT: Do you need halt in between your journey?

USER: I need a halt.

ASSISTANT: May I know your name please?

USER: Sure, my name is Stephanie Campbell.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you for choosing us.