You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good morning.

USER: I am James Young.

ASSISTANT: How can I assist you?

USER: There is as exhibition at JFK, so we would like to visit from LAX, could you please help me?

ASSISTANT: Young, could you please share me your travel dates?

USER: My travelling dates as we planned is from 07/18 to 07/20.

ASSISTANT: Please wait for a moment, let me check for the available flights to JFK.

USER: Sure, provide me the best result.

ASSISTANT: Sorry Young, there are no flights available to JFK on 07/18.

USER: That's ok, thank you for your service.

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