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