You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Christopher Jackson.

ASSISTANT: How may I assist you?

USER: I am planning to meet my sister at Philadelphia, will you help me in booking the flight ticket from DEN to PHL?

ASSISTANT: Sure, can I have your planned travel dates please?

USER: My preferable journey dates are Dec 17 and Dec 19.

ASSISTANT: Do you have any other specifications?

USER: I need a flight with single connection.

ASSISTANT: I found an economy class ticket in Delta airlines with fare 100 and it is a connecting flight. Can I book your ticket?

USER: Sure, you can proceed with the booking.

ASSISTANT: Ok, your booking is confirmed with flight number 1002.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.