You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: As there is sporting event in Chicago please book a ticket from Seattle.

ASSISTANT: Sure, may I know your journey dates?

USER: Journey dates are from 09/19 to 09/21.

ASSISTANT: Can you please provide your source and destination?

USER: It's WA-SEA to IL-ORD.

ASSISTANT: May I know your good name?

USER: My name is Patrick Hernandez.

ASSISTANT: Thank you for providing details, we found an airline: UA, flight number: 1012. With a single connection and price is 300. Shall I proceed to booking?

USER: I need flight with limit 200.

ASSISTANT: Sorry there is no flight is available with your fare.

USER: Thanks for the help.