You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you.

USER: I want to visit New York, could you please help me to book a flight from ATL to JFK.

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

USER: My departure date is 12/04 and my return date is 12/06 and my price limit is 500.

ASSISTANT: Ok, please wait a while, I will check the details.

USER: Ok.

ASSISTANT: As per your request there is no flight available. For documentation purpose, please share your name.

USER: I am Gary Walker, thank you for your information.

ASSISTANT: Thanks for contacting us. Have a nice day.