You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I assist you?

USER: Please change my existing reservation.

ASSISTANT: Sure, can I have your name please?

USER: My name is Lisa Evans.

ASSISTANT: We found reservation on your name, may I know your planned dates?

USER: My trip dates are 03/05 - 03/07.

ASSISTANT: Please let me know your airport codes.

USER: I will fly from MSP to ATL.

ASSISTANT: There is a connecting flight with price 200, flight number is 1027. Shall I make a move?

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been confirmed with Delta airlines.

USER: Thanks for your helping hand.

ASSISTANT: Have a good day.