You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Joseph Taylor.

ASSISTANT: How may I assist you Taylor?

USER: I would like to reach Austin-AUS to submit my documentary on plants, can you please find a flight me to travel there?

ASSISTANT: Sure, I will find for you.

USER: That's fine, thank you.

ASSISTANT: Could you please provide your preferable dates that you want to travel?

USER: Sure, the travelling dates that I want to move is on 07/13 and back from Austin on 07/15.

ASSISTANT: May I know your source airport code to proceed further?

USER: Sure, I want to start my trip from IAD location.

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

USER: Sure.

ASSISTANT: Sorry to inform you that, there are no flights available with your requested dates of travelling.

USER: It's alright, I will meet my friend and say the situation to reach other booking services.

ASSISTANT: Sorry for the inconvenience.

USER: Thank you.

ASSISTANT: Thank you for approaching us, have a great day?