You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of help you are looking for?

USER: I would like to attend an Innovation festival at Washington. Can you please help me to book a ticket?

ASSISTANT: Sure, may I know your name please?

USER: My name is Daniel Robinson.

ASSISTANT: Kindly assign your source and destination airport codes?

USER: I am heading to IAD from CLT.

ASSISTANT: On which dates you are planned to travel?

USER: My trip dates are Aug 26 and Aug 28.

ASSISTANT: Do you need connecting or direct flight?

USER: Yes, I need a single connecting flight.

ASSISTANT: Please let me know your other specifications. Ok, please be on hold.

USER: Sure.

ASSISTANT: We found a flight ticket in business class, price is 400, Airlines: American with connecting flight.

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket has been reserved with 1024 flight number.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.