You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Please reserve me a flight ticket from IAD to MCO.

ASSISTANT: Sure, may I know your trip dates please?

USER: My travel dates are Oct 02 and Oct 04.

ASSISTANT: Do you have any other requirements?

USER: I prefer connecting flight on this route.

ASSISTANT: Ok, can I know your name please?

USER: I am James Clark.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: No problem, thank you for the information.

ASSISTANT: Most welcome.