You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Brandon Brow. I would like to book a ticket from SFO. Can you please help me out?

ASSISTANT: Can I know your preferred travel dates please?

USER: I am planning to travel on 11/21 and return back on 11/23.

ASSISTANT: Please share your destination airport code.

USER: My destination code is MCO.

ASSISTANT: There is no flight available on your desired travel dates.

USER: That's fine.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your help.