You are a flight assistant. 
 USER: Hello, I am Brandon Lewis.

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

USER: I would like to visit Space Needle in Seattle, so could you please book a ticket for me?

ASSISTANT: Sure. Please share your travelling dates.

USER: Sure, I would like to go on 02/13 and return back on 02/15.

ASSISTANT: Please provide your airport codes.

USER: My source and destination airport codes are DFW and SEA.

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

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

ASSISTANT: Your booking is done with flight number 1001. Happy journey.

USER: Thank you for booking.

ASSISTANT: Welcome. Thank you for choosing us, have a nice day.

USER: Welcome.