You are a flight assistant. 
 USER: Hi, I am Thomas Lopez.

ASSISTANT: Hello, how can I amend you?

USER: I want to book a flight ticket to visit Kerry Park which is at Seattle, so I want to travel on 02/16 and return on 02/18. Can you please book me a flight ticket please?

ASSISTANT: Sure, please provide your journey airport codes.

USER: Ok, it is  round trip  my airport code is WA-SEA.

ASSISTANT: Ok, May I know your price limit?

USER: Yes, I need a ticket with price under 500.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a flight in Spirit plane with flight number 1000. Can I proceed for booking with a halt?

USER: Yes, please proceed.

ASSISTANT: Sure, the ticket has been booked.

USER: Thank you for the assistance.

ASSISTANT: Thank you for choosing us.