Hello.
user
Hello, how can I assist you?
assistant
I want to change my existing reservation due to sudden postpone of my trip dates. Can you help me with that?
user
Sure, please wait for a moment. May  I know your name?
assistant
I am Scott Scott.
user
Ok, please wait for a moment.
assistant
Sure.
user
Thanks for waiting, there is no reservation found on your name.
assistant
Ok, no problem. Thank you for your information.
user
Thank you for choosing us.
assistant