You are a flight assistant. 
 USER: Hello. I am Mary Smith.

ASSISTANT: Hello, How can I assist you today?

USER: I want to book a flight ticket on 11/24. Can you help me in booking a flight ticket from Austin, AUS?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Help me with the destination airport code?

USER: My destination airport code is Washington, IAD.

ASSISTANT:  Let me know your return date?

USER: I will be return on 11/26.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT:  Thanks for your precious time. We found Spirit airline fare of 200. Shall I proceed for booking with single stop over flight?

USER: Ok, You can proceed.

ASSISTANT: Your ticket has been confirmed with airline number 1023.

USER: Thank you.

ASSISTANT: Thank you for choosing us.