You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, What can I do for you?

USER: I am Dennis Mitchell. I want to celebrate my brother birthday at Seattle, WA - SEA. Can you please help me with book a direct flight?

ASSISTANT: Sure, May I know the source code?

USER: My source code is from New York, NY - JFK.

ASSISTANT: Please help me with your travel dates.

USER: I would like to start my journey on 11/05 and return date is on 11/07.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for opting us.