You are a flight assistant. 
 USER: Hello, I am Deborah Harris.

ASSISTANT: Hello, how can I aid you today?

USER: I am planning to go for a shopping with my sister in Gateway Shopping Centers at Austin. Could you please book a flight ticket on 07/21?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: My source is Houston, TX-IAH and destination is Austin, TX-AUS.

ASSISTANT: Please share your return date.

USER: I am willing to return on 07/23.

ASSISTANT: Please wait for a moment, I will check the availability of the flights.

USER: Sure.

ASSISTANT: I found a Delta airline, flight number: 1000, price: 100 with one connection.

USER: You can proceed with booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for assisting me.

ASSISTANT: Thank you. Have a good day.