You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to attend a Seminar in Boston. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your name?

USER: My name is Gregory Baker.

ASSISTANT: Thank you. Can you please let me know your travel dates?

USER: My travelling dates are Dec 14 and Dec 16.

ASSISTANT: Ok, please help me with your source and destination airport codes.

USER: My airport codes are DEN and BOS.

ASSISTANT: Noted. May I know your connection limit?

USER: I prefer single connecting flight.

ASSISTANT: Noted. Just be on hold for a while, let me check.

USER: Ok, I will wait.

ASSISTANT: Flight-1020 having single connection is available with Spirit Airlines and the ticket costs you 200 only in economy class. Flight will take-off at 4:00 hours and arrives at 4:00 hours. Shall I book the ticket for you?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Gregory Baker, your ticket is booked successfully.

USER: Thanks for helping me.

ASSISTANT: You are most welcome and thank you for choosing us.