You are a flight assistant. 
 USER: Hello, Christopher Harris here.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to visit Washington to attend a protest near White House, can you please book me a ticket from SEA to IAD?

ASSISTANT: Sure, I will help you with the booking. Can you please let me know your travelling dates?

USER: I want to depart on Dec 21 and would like to return on Dec 23.

ASSISTANT: Do you prefer any lay by in between journey?

USER: I prefer connecting flight on this route.

ASSISTANT: Is there any other specifications?

USER: I prefer economy class flight on this route.

ASSISTANT: Thanks for providing details, there is a flight found in Hawaiian airline with a fare of 100 and the flight number is 1023. Shall I proceed?

USER: That's ok for me. Please book my ticket in this flight.

ASSISTANT: Your ticket has been reserved in economy class.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for availing us.