You are a flight assistant. 
 USER: Hello, I am Donna Anderson.

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

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

ASSISTANT: Sure, I will help you. Can you please share your travelling dates?

USER: Sure, I would like to go on 12/02 and return back on 12/04.

ASSISTANT: Please provide your nearby airport codes.

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

ASSISTANT: Noted. Please wait for a while.

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 1000.

ASSISTANT: Your booking is done with flight number 1023. Happy journey.

USER: Thank you for booking.

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

USER: Welcome.