You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dennis Johnson.

ASSISTANT: How can I assist you Dennis?

USER: I am looking for a flight with stopover from Washington. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, can I know the journey dates please?

USER: I would like to take off on 07/11 and return 07/13.

ASSISTANT: Could you please provide the airport codes?

USER: My source airport code is IAD and destination airport code is JFK.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: I found a flight with connection 1 in Delta airline, can I book it?

USER: Please confirm the booking if the ticket fare is less than 500.

ASSISTANT: Your ticket has been booked with flight number 1026 and price is 200.

USER: Thank you for your service.

ASSISTANT: Thank you for approaching us, have a safe journey.