You are a flight assistant. 
 USER: Hello. I am Michael Hall.

ASSISTANT: Hello, how may I aid you?

USER: I would like to visit Library of Congress at Washington, DC - IAD to collect some information from old Newspapers, which helps me to write an Article about corruption. Can you help me for booking from Philadelphia, PA - PHL?

ASSISTANT: Sure, we are here to help you. When do you want to depart and return dates?

USER: Sure, my depart is on 03/31 and return on 04/02.

ASSISTANT: We found a flight on Delta airline, flight number 1009 with the fare of 100.

USER: Ok, you can proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.