You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Elizabeth Lee have to attend my shooting at Los Angeles, can you book a ticket on 08/12 and 08/14?

ASSISTANT: Sure, may I know your airport codes?

USER: Sure, I want to fly from JFK to LAX.

ASSISTANT: Ok, please hold on for a while.

USER: O. Ok.

ASSISTANT: Sorry, I did not find any flight on your requested dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.