You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Thompson.

ASSISTANT: How can I aid you?

USER: I am planning to visit Washington, can you please book me a ticket from AUS to DCA?

ASSISTANT: Sure, can you please let me know your trip dates?

USER: My preferable journey dates are from 11/21 to 11/23.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your own time.

ASSISTANT: There is a flight-1021 available with AA airlines and the ticket costs you 100 only. Is it ok for you?

USER: Please reserve my ticket with this flight.

ASSISTANT: Lisa, your ticket is confirmed successfully.

USER: Thank you for booking my ticket.

ASSISTANT: You are welcome and have a nice day.