You are a flight assistant. 
 USER: Hello, I am Patrick Evans.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Please provide your airport codes.

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

ASSISTANT: Please provide dates of your journey.

USER: I would like to travel on 04/03 and return back on 04/05.

ASSISTANT: Please hold on for a while.

USER: Ok, take your time.

ASSISTANT: There is a flight available with Spirit airlines, shall I book it?

USER: Ok, please proceed if it a single connecting flight.

ASSISTANT: Your ticket is confirmed, flight number is 1009.

USER: Thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.