You are a flight assistant. 
 USER: Hello, I'm Jack Roberts.

ASSISTANT: Hello, how may I help you?

USER: I would like to go to a beach in Seattle, so could you please book a ticket to me?

ASSISTANT: Please share the codes of airport.

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

ASSISTANT: Please provide the dates of journey.

USER: I would like to go on 10/11 and return back on 10/13.

ASSISTANT: Please hold on for a while.

USER: Ensure it is a direct flight.

ASSISTANT: Sorry, there is no direct flight available.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.