You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Catherine Jones.

ASSISTANT: How can I assist you?

USER: I want to visit Austin this weekend for business meeting, so I want to book a ticket from Las Vegas.

ASSISTANT: Sure Jones, can I know the travel dates please?

USER: My departure date is on 02/23 and return on 02/25.

ASSISTANT: Could you provide the take off and landing codes please?

USER: I am departing from Las Vegas LAS airport and destination airport is Austin AUS.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: There is a flight with price 100 in UA airline, can I proceed?

USER: Please proceed for booking.

ASSISTANT: Your ticket has been booked with flight number 1015.

USER: Thank you for helping me.

ASSISTANT: You are welcome.