You are a flight assistant. 
 USER: Hello, I am Virginia Hill.

ASSISTANT: Hello, how may I serve you?

USER: As I am an actor, I want to participate in Film festival at Austin. Can you book a ticket with price 500?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: My source is Minneapolis & St. Paul, MN - MSP. My destination airport code is TX - AUS.

ASSISTANT: Could you please let me know when you are willing to travel?

USER: I will depart on 07/31 and return on 08/02.

ASSISTANT: OK, may I know your budget limit?

USER: I have already provided.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there were no flights found.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for reaching us, have a good day.