You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Please book a flight ticket from SEA to ORD?

ASSISTANT: Sure, May I know your travelling dates?

USER: My journey dates are Apr 17 and Apr 19.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: I am Nicholas Young.

ASSISTANT: You have a direct flight 1006 in Delta airlines and price 200, Shall I proceed?

USER: Go ahead.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you.