You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Assist me in booking a flight ticket from PHL to DEN.

ASSISTANT: Sure, I am glad to help you. Do you prefer a connecting flight or a direct flight?

USER: Connected flight required.

ASSISTANT: Ok, let me know your planned dates.

USER: My travelling dates are Dec 16 and Dec 18.

ASSISTANT: Is there any class preference?

USER: No other specifications required for me.

ASSISTANT: Can I have your name please?

USER: I am Margaret Campbell.

ASSISTANT: Do you have any other concerns?

USER: No.

ASSISTANT: We found a connecting flight with a fare of 200 in 1003 United Airlines, shall I proceed?

USER: Sure, proceed to book it.

ASSISTANT: Ok, your ticket has been confirmed in economy class.

USER: Thanks for booking.

ASSISTANT: Thank you for availing us.