You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Can you please book a flight ticket to my brother with name Gregory Martinez?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT:  Could you please mention your brother's preferable travel dates?

USER: He want to travel in the dates of 04/18 and 04/20.

ASSISTANT: May I know your brother's convenient airport code names to travel?

USER: My brother's source location is Austin, the nearest airport code is AUS  and he need to reach New York- LGA.

ASSISTANT: Ok, please hold on a moment, I will check flight availability.

USER: Ok, take your time to check the best flight for me.

ASSISTANT: Sure. There is a flight available in this route as per your requested date, it is a direct flight and price is 100. Shall I confirm this flight ticket for your brother?

USER: Yes, I think he feel comfortable with this flight. So, you can proceed with booking.

ASSISTANT: Sure. I have confirmed your flight ticket in your brother's name, airline is UA and flight number is 1001.

USER: Thank you so much for your quick response. I am happy for your service that you provided. You’re the best travel agency in all the travel agencies I contacted.

ASSISTANT: Thank you for choosing us, have a good day.