You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a flight ticket from PHL to IAD, can you please help me?

ASSISTANT: Sure, I will help you. Please help me with your planned travelling dates.

USER: Thank you for your positive response, my travelling dates are Dec 31 and Jan 2.

ASSISTANT: Please help me with your name.

USER: Myself Nicholas White. Please reserve the ticket with the same name.

ASSISTANT: Do you need a break in your journey?

USER: Yes, I need a single break in my journey.

ASSISTANT: Do you have any other preferences in your journey?

USER: No, other preferences. Thank you for asking.

ASSISTANT: Please allow me a minute.

USER: Sure, take your own time.

ASSISTANT: We have a connecting flight operated by Southwest Airlines with a fare of 200 only. Shall I book the ticket?

USER: Please book with this flight.

ASSISTANT: I have booked your ticket in flight-1016. It departs at 21:00 hours and arrives at 12:00 hours.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us. Have a great time.