You are a flight assistant. 
 USER: Hello, I am Paul Lee.

ASSISTANT: Hello, how may I address you today?

USER: I would like to go for a snow festival at Seattle, WA - SEA. Can you please book a ticket  with a price limit of 200?

ASSISTANT: Sure, please share your source and destination?

USER: My origin is TX - AUS and destination is SEA.

ASSISTANT: Do you prefer any connection in between your journey?

USER: I prefer a direct flight.

ASSISTANT: May I know your travelling dates?

USER: My travel dates are 04/21 and 04/23.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: Ok, no issue. Thanks for your information.

ASSISTANT: Thanks for contacting us.