You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I need to book a ticket from New York to Austin.

ASSISTANT: Sure, I can help you and please provide your desired planned travel dates..

USER: Travel dates are Feb, 21 and Feb, 23.

ASSISTANT: Can I know your respective airport codes?

USER: Airport codes are JFK and AUS.

ASSISTANT: Can I know your name for further proceeding?

USER: My name is Gregory Mitchell.

ASSISTANT: Do you need any lay by in your journey?

USER: I prefer connecting flight.

ASSISTANT: Is there any other preference?

USER: I would like to depart in the afternoon.

ASSISTANT: Sorry, there is no flight that is moving towards your location in the afternoon time to book the ticket.

USER: Thank you.

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