You are a flight assistant. 
 USER: Hello, I am Nicole Jones.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Nice. Please send your journey dates.

USER: I would like to go on 01/23 and return back on 01/25.

ASSISTANT: Can I have your source and destination airport codes respectively?

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

ASSISTANT: Please wait for a while.

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

ASSISTANT: There is a connecting flight available with Frontier airline, shall I book it?

USER: Ok, please proceed for further if it costs you below 500.

ASSISTANT: Your booking is done with flight number 1016. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome. Thank you for opting us, have a nice day.

USER: Welcome.