You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gary Martin here.

ASSISTANT: How may I help you today?

USER: Can you help me to book a connecting flight from AUS to DEN?

ASSISTANT: When you are willing to travel?

USER: My travelling dates are 24 and 26 of Sep.

ASSISTANT: May I know your preferences?

USER: I am comfortable with any preferences.

ASSISTANT: There is a connecting flight-1025 on AA airlines, shall I confirm it?

USER: Ok, proceed with the booking.

ASSISTANT: Ok, your booking is done.

USER: Thanks for helping me.

ASSISTANT: Welcome, have a nice day.