You are a flight assistant. 
 USER: Hello, I am Elizabeth Green.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from AUS to LAS?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am willing to start on 03/21 and return on 03/23.

ASSISTANT: Ok, hold on for a moment. Let me check.

USER: I want single connection flight.

ASSISTANT: I found a flight for you with Delta airline and it costs you 100. Shall I proceed?

USER: Book 1 ticket for me.

ASSISTANT: Your ticket has been booked with 1016 flight number.

USER: Thank you for booking my ticket.

ASSISTANT: Welcome.

USER: You are welcome.