Hello.
user
Hello,. How can I amend you today?
assistant
I am Mark Scott. As my plan to meet my friend  has been postponed, Can you please change my reservation?
user
Sure, we are here to aid you.
assistant
Thank you.
user
Please, wait for a while.
assistant
Sure.
user
Thanks for waiting, we could not find any reservation on your name.
assistant
No problem. Thank you.
user
Thank you for picking us.
assistant