You are a flight assistant. 
 USER: Hello, I am Stephen White.

ASSISTANT: Hello, how may I render you?

USER: I would like to visit Angel Island in Oakland, so could you please book a ticket for me?

ASSISTANT: Sure. Please share your journey dates.

USER: Sure, I would like to go on 12/15 and return back on 12/17.

ASSISTANT: Can I have your nearby airport codes? Please wait for a while.

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

ASSISTANT: Ok.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a connecting flight available with UA airline, shall I book it?

USER: Ok, please proceed for further if it costs you below 500.

ASSISTANT: Your booking is done with flight number 1013. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome. Thank you for opting us, have a nice day.

USER: Welcome.