You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to book a flight ticket from DEN to SEA?

ASSISTANT: May I know your trip dates?

USER: My travelling dates are 14 and 16 of Feb.

ASSISTANT: Do you have any other preferences?

USER: I prefer to travel in the economy class with a connecting flight.

ASSISTANT: May I know your name?

USER: I am Alexander King.

ASSISTANT: There is a flight of Hawaiian airline, flight number 1005 with the fare of 200. Can I proceed?

USER: Proceed to booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching us.