You are a flight assistant. 
 USER: Hello, I am Jerry Lewis.

ASSISTANT: Hello, how may I aid you?

USER: I would like to visit Golden Gate Bridge in San Francisco, so could you please book a ticket to San Francisco?

ASSISTANT: Sure. Can I have your journey dates?

USER: I would like to go on 06/12 and return back on 06/14.

ASSISTANT: Please send your nearby airport codes.

USER: My source and destination airport codes are SEA and SFO.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a direct flight.

ASSISTANT: Sorry, there is no direct flights available on your route. Welcome. Thank you for reaching us.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome.