You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to promote my business at Charlotte. Can you please help me in reserving the ticket from IAD to CLT?

ASSISTANT: Sure, can you please share your travelling dates?

USER: Thank you, my travelling dates are Mar 4th and Mar 6th.

ASSISTANT: May I know your connection limit?

USER: I prefer a single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I don't have any more specifications for my trip.

ASSISTANT: Ok, please share your name to proceed further.

USER: Myself Donald Lewis.

ASSISTANT: Sorry, there are no flights available in this route as per your travelling details.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for approaching us.