You are a flight assistant. 
 USER: Hello, I am Joshua Davis.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, can you please share your journey dates?

USER: Sure, my journey dates are Dec 18 and Dec 20.

ASSISTANT: Do you have any specifications to be met?

USER: I need a halt. Please make sure it should be normal cost airline.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We have found a direct flight of AA airlines, flight number-1016 and fare-100 airline preference - normal cost. Shall I proceed?

USER: Go ahead.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.