You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Andrew Lewis.

ASSISTANT: How may I help you?

USER: I want to attend a meeting in Detroit. Can you book a ticket from IAD to DTW?

ASSISTANT: Sure, can I have your trip dates please?

USER: I want to fly on 08/19 and 08/21.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thank you for your waiting, I found a flight for you in AA airlines with price 200. Can I proceed?

USER: Proceed to booking.

ASSISTANT: Ok, your booking is confirmed with flight number 1008.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.