You are a flight assistant. 
 USER: Hello, I am Margaret Miller.

ASSISTANT: Hello, how may I aid you at this moment?

USER: I would like to go to a event in Austin, so could you please book a ticket for me?

ASSISTANT: Nice. Can I have your travelling dates?

USER: Sure, I would like to go on 07/16 and return back on 07/18.

ASSISTANT: Please send your airport codes.

USER: My source and destination airport codes are IAD and AUS.

ASSISTANT: Please wait for an moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: I found a flight with Delta airline, shall I book it?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is confirmed with flight number 1002. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Welcome.