You are a flight assistant. 
 USER: Hello, I am Carol Thompson.

ASSISTANT: Hello, how can I assist you?

USER: My Business meeting has postponed so, I would like to change my existing reservation. Can you please help me with that?

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: We are happy to inform you that there is a reservation found on your name. Could you please share your new journey details.

USER: Sure, I would like to fly from DCA-DEN.

ASSISTANT: Please provide your journey dates.

USER: My journey dates are from 10/18 to 10/20.

ASSISTANT: AA airlines with single connection and price is 300 of 1004 flight.

USER: Ok, you can proceed with my booking.

ASSISTANT: Shall I proceed for booking?

USER: Yes, you can.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you.