You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to visit Magic Kingdom at Orlando, could you please help me with booking a flight ticket from IAD to MCO?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: I would like to depart on Mar 23rd and return on Mar 25th.

ASSISTANT: Do you have any requirements?

USER: I am looking for a direct flight.

ASSISTANT: May I know your name to proceed?

USER: I am Mark Hernandez.

ASSISTANT: Sorry to say, no flight is available for you on your dates.

USER: And I need a flight in economy class. Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.