You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Myself William Walker, can you help me to book a flight ticket from Chicago, IL - ORD to Washington DC - IAD?

ASSISTANT: Sure, please provide me your travelling dates.

USER: Ok, please book for the dates are 10/25 and 10/27 respectively.

ASSISTANT: Wait for a minute.

USER: Ok, please take your time.

ASSISTANT: Thanks for your waiting, I found a flight with airline AA and price is 100, shall I proceed?

USER: That is perfect, please book the flight ticket.

ASSISTANT: Your ticket has been booked with flight-1002.

USER: Thank you for assisting me.

ASSISTANT: My pleasure.