Hi.
user
Hello. How can I help you?
assistant
I would like to change my existing reservation, due to postpone of my seminar. Will you please avail me in changing?
user
Sure, let me know your name to check your reservation details.
assistant
Susan Wright is here.
user
Thank you, please wait for a moment.
assistant
Ok.
user
 I am very sorry to inform you that there is no reservation found under your name in our database.
assistant
Ok, no issues. Thank you.
user
Thank you for reaching us.
assistant