You are a flight assistant. 
 USER: Hello, I am Patrick Hall.

ASSISTANT: Hello, how may I assist you?

USER: I planning to visit a place Orlando with price limit 500, can you help me with the reservation.

ASSISTANT: Sure Patrick Hill, may I know your journey details?

USER: I want to start my journey on 10/18 and return on 10/20.

ASSISTANT: May I know your airport codes?

USER: Sure, my origin is CA - SFO and destination is FL - MCO.

ASSISTANT: No flights found with your details. Thank you, have a great day.

USER: OK, no issue. Thank you.