Hi.
user
Hello. How can I help you?
assistant
Could you please change my existing reservation due to postpone of my trip?
user
Sure, I will help you to change your reservation.
assistant
Thank you.
user
Ok, please mention your name.
assistant
My name is Debra Wilson.
user
Sorry, no reservation found on your name to change your reservation.
assistant
Not a problem, thanks for checking.
user
Welcome, have a nice day.
assistant