You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you today?

USER: Please book a ticket from Chicago, IL-ORD to Washington DC-IAD.

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

USER: Departure is by 09/22 and 09/24 is return date.

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

USER: Yes, I need a halt.

ASSISTANT: May I know your good name?

USER: My name is Anna Clark.

ASSISTANT: Please wait for a moment.

USER: Sure.

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

USER: Thanks.

ASSISTANT: Thank you for reaching us.