You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I guide you?

USER: I am Joseph Evans want to visit Philadelphia, can you book a ticket from IAD to PHL?

ASSISTANT: Sure, when would you like to plan your journey?

USER: Sure, my travelling dates will be 02/19 and 02/21.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for your waiting, I found a flight for you in Spirit airlines with price 100. Shall I proceed?

USER: Yes, proceed with my booking.

ASSISTANT: Ok, your ticket has been booked with flight number 1012.

USER: Thank you.

ASSISTANT: Thank you for approaching us.