You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I have a conference in New York, can you help me in booking ticket?

ASSISTANT: Sure, may I know the travel dates please?

USER: My travel dates are 09/07 and 09/09.

ASSISTANT: Ok, can you please share your airport codes?

USER: My airport codes are LAX to EWR.

ASSISTANT: Ok, hold on for a moment please. Let me check the availability of flights.

USER: Ok.

ASSISTANT: May I know your name please?

USER: Myself Joseph Lee.

ASSISTANT: Sorry to inform you Lee, there are no flights on your requested dates.

USER: No problem, thanks for checking.

ASSISTANT: Thank you reaching us. Have a good day.