You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Please book me a flight ticket from MCO to IAD to meet my family.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: I have planned to travel on Aug 07th and return on Aug 09th.

ASSISTANT: Ok, could I have your name please?

USER: Myself George Nelson.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I am ok with any flight.

ASSISTANT: Ok, do you have any other specifications?

USER: No, thanks.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, no problem. Thank you so much.

ASSISTANT: You are welcome, have a great day.