You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you now?

USER: I want to go Austin for attending summit there, can you please book a flight ticket from Las Vegas on 01/11?

ASSISTANT: Sure, I will help you with that.

USER: Thanks.

ASSISTANT: May I know the airport codes of your journey?

USER: I want to fly from LAS airport and destination airport is AUS.

ASSISTANT: Ok, may I know your name please?

USER: Sure, my name is Robert King.

ASSISTANT: Do you want any return ticket?

USER: Yes, please book my return ticket to Las Vegas on 01/13.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight 1004 in Delta airline has the price 100.

USER: I am comfortable with this airline, please book this flight ticket on my name.

ASSISTANT: Sure. Your ticket has been booked, have a safe journey.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us, have a nice day.