You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, can I help you today?

USER: I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Please help me out.

ASSISTANT: Ok, may I know do you want to cancel it or change it?

USER: Please change my reservation.

ASSISTANT: Ok, may I know your name?

USER: I am Dennis Garcia.

ASSISTANT: We found your reservation, can I know your new journey details?

USER: My travelling dates are from 08/31 to 09/02. I want to fly from AUS to EWR.

ASSISTANT: Thank you, please wait.

USER: Okj.

ASSISTANT: We found a flight of Delta airline, flight number as 1000 with the fare of 100.

USER: Please go with booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for availing us.

ASSISTANT: Thank you.