You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I am David Green. I want to book a ticket from AUS to AUS, can you help me?

ASSISTANT: Sure, may I know your trip dates?

USER: My travel dates are 10/29 and 10/31.

ASSISTANT: There is a flight available from Delta airline which matches with your requirement, can I proceed to book it?

USER: You can book it.

ASSISTANT: Ok, your reservation is confirmed.

USER: Thank you for booking.

ASSISTANT: You are welcome.