You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ashley Thomas.

ASSISTANT: How may I assist you at this moment?

USER: I want to go Austin next month for my film shooting purpose, can you please book a flight ticket for me on 05/25.

ASSISTANT: Sure, I am glad to help you. May I know your origin and destination airport codes for booking?

USER: Thank you, I want to take off from OAK and destination airport is AUS.

ASSISTANT: Is there any return trip that you are planning?

USER: Yes, please book my return ticket also on 05/27.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Ok.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 is provided by Frontier airlines. Shall I proceed with this?

USER: Please book this flight ticket for me.

ASSISTANT: Ok, your ticket has been booked in flight number 1003.

USER: Thank you for your service.

ASSISTANT: Thank you for approaching us, have a great journey.