You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I would like to visit at Chicago to meet my best friend, can you help me to book a flight ticket from AUS to ORD?

ASSISTANT: May I know your trip dates?

USER: My travelling dates are 08 and 10 of Apr.

ASSISTANT: Do you prefer any specifications?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: I am Donald Taylor.

ASSISTANT: Delta airlines providing a connected flight in economy class.

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you.