You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Dorothy Baker. I would like to book a flight ticket from New York NY-JFK, to attend sister wedding in Chicago. Will you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are 04/02 and 04/04.

ASSISTANT: May I know your destination airport code?

USER: My destination airport code is IL-ORD.

ASSISTANT: Sorry there is no flight on your details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you.