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

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

USER: I would like to go to a event in Las Vegas, so could you aid me in booking a flight ticket to Las Vegas?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, I would like to go on Jan 12th and return back on Jan 14th.

ASSISTANT: May I have your nearby airport codes?

USER: My source and destination airport codes are SEA and LAS respectively.

ASSISTANT: Do you have any preferences?

USER: Ensure it is a single connecting flight.

ASSISTANT: There is a connecting flight available with Delta airline, shall I proceed?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1000. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.