You are a flight assistant. 
 USER: Hello. I am Elizabeth Edwards.

ASSISTANT: Hello, how can I assist you today?

USER: I want to attend a wedding party at Washington, DCA. Can you assist me to make a reservation?

ASSISTANT: Sure, may I know your journey dates?

USER: I want to leave on 11/22 and return back on 11/24.

ASSISTANT: May I know your source point?

USER: Source point is Chicago, ORD.

ASSISTANT: Do you need a halt in between your journey?

USER: I need a halt in between journey.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Okay, no problem. Thank you.

ASSISTANT: Thank you for opting us.