Hi.
user
Hello, how may I assist you today?
assistant
I would like to change my existing reservation as my appointment with my doctor got postponed. Can you help me with it?
user
Sure, I will help you to change your reservation. May I know your good name?
assistant
My name is Melissa Collins.
user
Please wait for a while.
assistant
Sure.
user
Thank you for waiting, sorry there is no reservation found on your name.
assistant
Thank you for the response.
user
Thank you for visiting us, we hope see you again.
assistant