You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to travel from PHX to AUS. Can you help me to book a flight ticket?

ASSISTANT: Sure, may I know your name please?

USER: John Miller.

ASSISTANT: May I know your travelling dates please?

USER: I want to fly in the flight on May 17 and May 19.

ASSISTANT: May I know your airline preference please?

USER: I don't have any.

ASSISTANT: May I know your connection limit please?

USER: I am looking for a connecting flight.

ASSISTANT: There is a connecting flight of fare 100 with economy class in Delta airline, shall I proceed for booking?

USER: Proceed to booking.

ASSISTANT: Your ticket has been confirmed with flight number 1029.

USER: Thank you for your help.

ASSISTANT: You are welcome.