You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is David Clark. I would like to book a ticket to Philadelphia, to address a business meet.

ASSISTANT: Sure, I am here to help you. Please provide me your trip dates.

USER: My itinerary dates are Nov 25 and Nov 27.

ASSISTANT: Ok, can I know your source and destination airport codes?

USER: My genesis and terminus airport codes are JFK and PHL.

ASSISTANT: Ok, do you prefer for business class or economy class?

USER: I am flexible with either class.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure.

ASSISTANT: There is a flight available with Delta airlines and the ticket fare is 200 only. Is that ok for you?

USER: Sure, please proceed with the booking.

ASSISTANT: David Clark, your ticket is booked successfully and your flight number is 1015.

USER: Thank you for the help.