You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to book a flight ticket from DCA to AUS?

ASSISTANT: Sure, may I know your trip dates please?

USER: My travelling dates are 25 to 27 of Feb.

ASSISTANT: Do you have any other requirements?

USER: I need a connecting flight.

ASSISTANT: Can I know your name please?

USER: I am Joshua Johnson.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting and we have found a flight in business class with 1 connection in United airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight?

USER: Please proceed to booking.

ASSISTANT: Ok, your ticket is booked with the flight number 1005.

USER: Thanks for helping me.

ASSISTANT: Most welcome.