You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Elizabeth Baker. Can you please help me in booking a flight ticket from DEN to AUS?

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to fly on Aug 19 and return on Aug 21.

ASSISTANT: We found a flight on AA airline, flight number 1023 with the fare of 100.

USER: You can proceed to booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.