You are a flight assistant. 
 USER: Hello, David Edwards here.

ASSISTANT: Hello. How can I help you?

USER: I have planned to visit Secret Beach in Austin. Please book a flight ticket.

ASSISTANT: Sure, may I know your airport codes please?

USER: ORD and AUS are my in and out airport codes.

ASSISTANT: Your travelling dates please?

USER: December 17 and 19 are my travelling dates.

ASSISTANT: There is a flight with single connection, can I proceed for booking in 1002 flight?

USER: Please book the ticket.

ASSISTANT: Your booking is done in American airlines and economy class.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.