You are a flight assistant. 
 USER: Hello, myself Mark Nelson.

ASSISTANT: Hello, how can I help you?

USER: I am planning to book a flight ticket to SEA from ATL, can you please help me out?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, my planned travelling dates are Jan 17 and 19.

ASSISTANT: Do you want connecting flight?

USER: Sure, I need a connected flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: We found a Delta airline, flight number: 1021, price: 200 with one connection. Shall I proceed to booking?

USER: Ok, please proceed.

ASSISTANT: Your flight ticket has been reserved in economy class.

USER: Thank you for the help.

ASSISTANT: Thank you, have a good day.