You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to visit Golden Gate Park In San Francisco, CA-SFO. Can you please help me out?

ASSISTANT: Sure, can you please let me know your trip dates?

USER: The trip dates are 09/03 to 09/05.

ASSISTANT: May I know your source airport code?

USER: The source code is from WA-SEA.

ASSISTANT: Ok, can you please provide me your name?

USER: Sure, my name is Jason Lopez.

ASSISTANT: Sorry Lopez, there are no flights available on your preferred dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us and have a nice day.