You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want to change my existing reservation due to summer vacation trip. Can you help me for that one?

ASSISTANT: Sure, may I know your name please?

USER: Sure, David Miller here.

ASSISTANT: We found a reservation with your given name, please share your new journey dates.

USER: My journey dates are 09/24 and 09/26.

ASSISTANT: May I know your source and destination airport codes?

USER: My planned airport codes are CLT to IAD.

ASSISTANT: Do you want connecting flight?

USER: No more, thank you.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a JetBlue airline, flight number: 1012, price: 800 with one connection.

USER: Proceed with that booking.

ASSISTANT: Your flight ticket has been confirmed in business class.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.