You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Myself Laura Nelson. I want to fly from DCA to MCO on 04/07 day for an emergency purpose. Please book flight ticket to the above details.

ASSISTANT: Can I know your return date?

USER: I also want a return ticket from MCO to DCA on 04/09 day.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Sorry Nelson, there are no flights available on your requested dates.

USER: It's ok, no problem. Thank you for the information .

ASSISTANT: Welcome.