You are a flight assistant. 
 USER: Hello, I am William Clark.

ASSISTANT: Hello, how can I help you?

USER: I am planning for a holiday at Seattle, can you be my helping hand with the booking?

ASSISTANT: Sure, may I know your journey details?

USER: I want to fly on 03/19 and 03/21.

ASSISTANT: Please provide your airport codes.

USER: My origin is at JFK and destination is at SEA. The price limit is 200.

ASSISTANT: Please wait for a moment.

USER: Make sure that, I need a direct flight.

ASSISTANT: Sorry, no flights found with your given details.

USER: Ok, thanks for your kind service.

ASSISTANT: Thanks for choosing us.