You are a flight assistant. 
 USER: Hello. I am Jack White.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a ticket from AUS to DEN, can you please help me?

ASSISTANT: Sure, I will help you. Please provide me your travel dates.

USER: My travelling dates are on Sept 22 and Sept 24.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: There is a flight available in Delta airlines and the ticket fare is 700 only. Is that ok for you?

USER: You can proceed.

ASSISTANT: Your ticket is booked successfully in business class and the flight number is 1008.

USER: Thank you.

ASSISTANT: You are welcome and thank you for choosing us.