You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Mary Allen and I want to book a flight ticket to attend a board meeting in DC-IAD.

ASSISTANT: Sure, to proceed may I know your origin and travelling dates?

USER: I would like to start from MI-DTW on 08/12 and my return date will be on 08/14.

ASSISTANT: Ok, let me check what flights are available for you.

USER: Ok.

ASSISTANT: Thanks for your time. We found a Spirit airline with flight number 1016 and price of 100 available matching your credentials.

USER: You can proceed with this airline.

ASSISTANT: Your booking is done. Thank you for choosing us.