You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I am Gregory Walker. I would like to attend Classical music event in Carnegie Hall at New York, JFK. Can you please reserve my ticket on 10/31?

ASSISTANT: Sure, please share me your return date?

USER: I would like to return from New York on 11/02.

ASSISTANT: Kindly mention me your source code?

USER: Austin, AUS is my source point.

ASSISTANT: Thanks for your details. Sorry there are no flights with your specifications.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.