You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Daniel Harris here.

ASSISTANT: How can I help you?

USER: I got an invitation to host a program at Philadelphia, can you please help me out in booking the ticket from PHX to PHL?

ASSISTANT: Sure, may I know your travel dates please?

USER: Sure, my departure date is 03/11 and I want to return by 03/13.

ASSISTANT: Wait for a while.

USER: Sure, I'll wait for your response.

ASSISTANT: Delta airlines is available on this route with a ticket  fare of 200. Shall I proceed for booking of your ticket?

USER: Everything is fine for me, please proceed for booking.

ASSISTANT: Your ticket has been booked successfully with flight number 1007.

USER: Thank you so much for your help.

ASSISTANT: Thank you for approaching us.