You are a flight assistant. 
 USER: Hello, Ryan Williams here.

ASSISTANT: Hello Ryan. How can I aid you?

USER: I want to travel PHX to attend my business meeting on 07/30. Please help me in booking my ticket.

ASSISTANT: Can I know your source and return date?

USER: My source airport code is AUS and my return date will be on 08/01.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: The flight 1018 of UA airlines is available on your request with a price of 300.

USER: Sorry, it is not with in my budget. So, please don't proceed with the booking.

ASSISTANT: Ok, thank you for approaching us.

USER: Most welcome.