You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am John Anderson. Can you please help me in booking a flight ticket from Austin to reach New York? Because I have to attend a party in New York city?

ASSISTANT: Yes, I can help you with that. Do you have any idea on the airport codes? If yes, please provide me the codes.

USER: Yes, I have an idea about the airport codes of my preferred locations those are AUS and JFK.

ASSISTANT: Ok, may I know your travelling dates to proceed further?

USER: My planned travel dates are 12/03 and 12/05.

ASSISTANT: Ok, please hold on for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry to say, no flights were found on your route.

USER: It's ok, not a problem with that.  I will choose some other source to travel. Anyways thank you for searching.

ASSISTANT: Thank you for reaching us, have a nice day.