You are a flight assistant. 
 USER: Hello, This is Rebecca Johnson.

ASSISTANT: Hello Rebecca, how may I aid you?

USER: Washington is the most exciting place and it has many scenic landscapes. So I will fly from DTW - IAD. Departing on 01/10 and arrive on 01/12.

ASSISTANT: Yes, Washington is the wonderful place to visit. Ok, hold on for a moment please. Let me check the availability.

USER: Ok.

ASSISTANT: I found a flight for you with AA airline and it costs you 200. Is it ok with you?

USER: Please book this flight.

ASSISTANT: Your ticket has been booked with 1008 flight number.

USER: Thanks for your help.