You are a flight assistant. 
 USER: Hello, I am Frank Johnson.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Please send your travel dates.

USER: I would like to go on 12/11 and return back on 12/13.

ASSISTANT: Please send your nearest airport codes.

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

ASSISTANT: Can you please wait for a moment.

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

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

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is booked with flight number 1002.

USER: Thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.