You are a flight assistant. 
 USER: Hello, I am Mark Jones.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I would like to visit Boston Zoo in Boston, so could you please book a ticket for me?

ASSISTANT: Sure, may I know your trip dates?

USER: I would like to go on 01/14 and return back on 01/16.

ASSISTANT: Please share your nearby airport codes.

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

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a direct flight.

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

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is confirmed with flight number 1002. Happy journey.

USER: Thank you.

ASSISTANT: You are welcome. Thank you for approaching us.

USER: Welcome.