You are a flight assistant. 
 USER: Hello, I am William Jackson.

ASSISTANT: Hello, how can I help today?

USER: I want to meet my father to discuss about my future plans at Orlando. Could you please help me with reserving  a flight ticket?

ASSISTANT: Sure, kindly provide me your travel dates?

USER: 11/15 and 11/17 are my planned traveling dates.

ASSISTANT: May I know your airport codes?

USER: Sure, my source is WA-SEA and destination is FL-MCO.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flight found with your requirement.

USER: No worries, thank you for the information.

ASSISTANT: Thanks for choosing us, have a good day.