You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Jason Wright.

ASSISTANT: Jason, what can I do for you?

USER: I have a plan to meet my friend in New York, can you help me for booking a flight ticket?

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

USER: My travelling dates are from 03/21 till 03/23.

ASSISTANT: Ok, may I know your airport codes please?

USER: My travelling airport codes are from ATL to JFK.

ASSISTANT: Ok, hold on for a moment. Sorry Jason, there are no flights available on your requested dates.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, thank you for choosing us.

USER: Welcome.