You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am William Collins, planning to visit Orlando. Can you please book me a ticket from DCA to MCO?

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

USER: My preferable journey dates are from Jan 07 and Jan 09.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I prefer evening return time flight.

ASSISTANT: May I know your connection limit?

USER: I prefer connecting flight on this route.

ASSISTANT: Please wait for a moment.

USER: Sure.

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

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us.