Hello.
Hello, how  can I help you for the day?
I want to make changes in my existing reservation as my trip is postponed to next month, can you help me?
Sure, I am here to help you with that changing reservation. May I know your name please?
The name on the ticket is Michelle Johnson.
Please wait for a moment, let me check your previous reservation status.
Sure, I will wait for your response.
Thank you for waiting.
My pleasure.
There is no reservation found on your name in our reservation list to change it.
Not an issue, anyway thank you for checking.
Thank you for reaching us. Have a great day.