You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I need a flight ticket from Los Angeles to reach New York, can you please find a flight ticket for me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please pass on your planned travel dates to check for flights?

USER: My desired departure and arrival dates are Sept 12 and Sept 14.

ASSISTANT: Ok, do you have any class preference?

USER: No, I didn't have any class preference.

ASSISTANT: May I know your destination airport code please?

USER: The destination airport code is JFK.

ASSISTANT: Is there any specific airline you want to travel in?

USER: No, I didn't have any airlines preference.

ASSISTANT: Would you like any lay off in between your journey?

USER: I am looking for a direct flight.

ASSISTANT: Are there any preferred travel timings you need for your journey?

USER: No but just now, I decided to travel in an economy class. So please check for that.

ASSISTANT: Sure, will you please share your name to proceed further in booking process?

USER: My name is Andrew Collins.

ASSISTANT: Please stand by, I will check for the availability of your desired flight.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting. Sorry, no flights found as per your request.

USER: It's ok, not a problem with that. Thank you for searching the flight.

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