You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Elizabeth Davis want to attend my colleague's ring ceremony at Washington, can you book a ticket from MCO to DCA?

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

USER: Sure, my travelling dates will be 04/01 and 04/03.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: Elizabeth Davis, there are no flights available on your provided dates due to heavy bookings.

USER: That's ok, thank you.

ASSISTANT: Thank you for contacting us.