You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Ryan Lopez, I need to book a flight to Washington DC - IAD from Chicago IL - ORD as my wife who is working there, met with an medical emergency. The depart date is 09/17 and return date is 09/19. I would like you to find a flight with price limit:200.

ASSISTANT: Ok, Please wait for a while I will check the availability and let you know.

USER: Sure.

ASSISTANT: Thank you for waiting, we have found flight that matches your requirements.

USER: OK. You can proceed with the ticket booking.

ASSISTANT: The flight details are airline:Delta and flight number:1002 with direct flight.

USER: OK.

ASSISTANT: Ok, your booking is done.

USER: Thank you, I appreciate your efforts.