You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nicholas Harris.

ASSISTANT: How may I serve you today?

USER: I would like to enjoy this Christmas at Space Needle which is at Seattle, can you please book me a flight ticket within price 200?

ASSISTANT: Sure, we are mirthful to help you in booking.

USER: Thank you.

ASSISTANT: Kindly share your planned travelling dates to proceed further.

USER: I will go on 12/25 and return back on 12/27.

ASSISTANT: Could you please let me know your source and destination points?

USER: I want to fly from DTW to SEA.

ASSISTANT: Do you need a whistle stop in between your journey?

USER: Yes, I need a whistle stop.

ASSISTANT: Ok, please wait a moment I will search best flight for you.

USER: Ok, take your time.

ASSISTANT: Thank you  for waiting, we found a Hawaiian airline matching your essential details with single connection and the fare 100. Shall I book the ticket?

USER: Please go ahead with the booking.

ASSISTANT: Your ticket has been confirmed with the flight number-1016.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.