You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hi,. How can I aid you?

USER: I am James Clark. As I am a scientist, I want to attend a seminar held on New York so I need to book a ticket.

ASSISTANT: Sure,may I know the your travelling details?

USER: I would like to travel from Austin, TX - AUS on 09/10. My return date is on 09/12 and my destination airport code is NY - EWR.

ASSISTANT: Fine,wait a minute,I will inform you.

USER: Ok.

ASSISTANT: Sorry for inconvenience,no ticket found on your journey date. Thank you for contacting us.

USER: Ok, no issue.

ASSISTANT: Have a nice day.

USER: Thank you for your service.