You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Betty Campbell here.

ASSISTANT: How can I help you?

USER: I need to travel from ORD to AUS, can you reserve a flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: My journey dates are 04/25 to 04/27.

ASSISTANT: Flight-1000 is available in UA airlines with single connection and the flight fare is 200. Can I proceed?

USER: I need economy class.

ASSISTANT: Flight-1000 is Economy flight.

USER: Ok, please proceed.

ASSISTANT: Your booking is confirmed.

USER: Thank you.