You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: Can you help me to reserve a flight ticket from PHL to AUS?

ASSISTANT: Sure, I am here to help you with that. On which dates you are willing to travel?

USER: My travelling dates are 22 to 24 of Nov.

ASSISTANT: Ok, on which airlines do you prefer to travel?

USER: I am ok with any airline.

ASSISTANT: Ok, may I know your name to proceed further?

USER: I am Dennis Edwards.

ASSISTANT: Ok, do you prefer a direct flight or a connecting flight?

USER: I need a connecting flight.

ASSISTANT: Ok, please hold on for a while.

USER: Sure. I would like to travel in business class.

ASSISTANT: The connecting flight is available in the JetBlue airlines with the ticket fare of 200 and this is an economy class. Can I confirm whether to book the ticket or not? Sorry to inform you, there is no flight in the business class.

USER: It's ok, not a problem, thank you.

ASSISTANT: You are welcome. Thank you for choosing us.