You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this time.

USER: I am Margaret Lee. I am looking for a flight from OAK to AUS, can you help me out in booking the flight ticket?

ASSISTANT: Sure, I am glad to assist you in ticket booking process and can you please mention your travelling dates?

USER: My travelling dates are from 01/30 till 02/01.

ASSISTANT: Please wait for a while to check for the flight based on your details.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting, there is no flight on your trip dates due to completion of seats to book the ticket to your location.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: You are most welcome and next time we can serve you better, thank you for consulting our agency.