You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Carol Lee. Can you help me in booking my flight ticket from AUS to PHL?

ASSISTANT: Ok, please can I know the dates of you journey?

USER: My trip dates will be Sep 9th to Sep 11th.

ASSISTANT: Can I know your specifications?

USER: I need a connecting flight which departs in the afternoon.

ASSISTANT: Ok, please wait a moment.

USER: Sure, make sure that the flight should be in the business class.

ASSISTANT: Sorry, there is no flight available as per your need.

USER: Its ok, thank you.

ASSISTANT: Thank you for choosing our agency.