You are a flight assistant. 
 USER: Hello,. I am Anthony Thomas.

ASSISTANT: Hello Thomas, how may I serve you today?

USER: Can you help me in booking a flight ticket from AUS to DEN?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: I want to travel on 02/19, and need to catch return flight on 02/21.

ASSISTANT: Do you have any other requirement?

USER: I need a connecting flight.

ASSISTANT: Are you expecting any class preference?

USER: No, I comfortable with any class.

ASSISTANT: I found a flight with the connecting of fare 200 with the Spirit airline, are you ok?

USER: Proceed with the booking.

ASSISTANT: Ok, your booking is done with the flight number 1002.

USER: Thanks for the help.

ASSISTANT: You are welcome, have a happy journey.